EP3310337A1 - Implants comprenant un oxystérol et procédés d'utilisation - Google Patents

Implants comprenant un oxystérol et procédés d'utilisation

Info

Publication number
EP3310337A1
EP3310337A1 EP16812443.6A EP16812443A EP3310337A1 EP 3310337 A1 EP3310337 A1 EP 3310337A1 EP 16812443 A EP16812443 A EP 16812443A EP 3310337 A1 EP3310337 A1 EP 3310337A1
Authority
EP
European Patent Office
Prior art keywords
implant
oxysterol
matrix
amount
bone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16812443.6A
Other languages
German (de)
English (en)
Other versions
EP3310337A4 (fr
EP3310337B1 (fr
Inventor
Benjamin T. REVES
David S. Scher
Susan J. Drapeau
Roger E. Harrington
Jerbrena C. JACOBS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Warsaw Orthopedic Inc
Original Assignee
Warsaw Orthopedic Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US14/741,673 external-priority patent/US9878070B2/en
Priority claimed from US14/796,601 external-priority patent/US10632230B2/en
Priority claimed from US14/796,625 external-priority patent/US9987289B2/en
Priority claimed from US14/796,564 external-priority patent/US9877836B2/en
Application filed by Warsaw Orthopedic Inc filed Critical Warsaw Orthopedic Inc
Priority to EP21152266.9A priority Critical patent/EP3834816A1/fr
Publication of EP3310337A1 publication Critical patent/EP3310337A1/fr
Publication of EP3310337A4 publication Critical patent/EP3310337A4/fr
Application granted granted Critical
Publication of EP3310337B1 publication Critical patent/EP3310337B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
    • A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
    • A61K9/5005—Wall or coating material
    • A61K9/5021—Organic macromolecular compounds
    • A61K9/5031—Organic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyethylene glycol, poly(lactide-co-glycolide)
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/28—Bones
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/56—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids
    • A61K31/575—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids substituted in position 17 beta by a chain of three or more carbon atoms, e.g. cholane, cholestane, ergosterol, sitosterol
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/14—Macromolecular materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
    • A61L27/3604—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix characterised by the human or animal origin of the biological material, e.g. hair, fascia, fish scales, silk, shellac, pericardium, pleura, renal tissue, amniotic membrane, parenchymal tissue, fetal tissue, muscle tissue, fat tissue, enamel
    • A61L27/3608—Bone, e.g. demineralised bone matrix [DBM], bone powder
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/40—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
    • A61L27/44—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having a macromolecular matrix
    • A61L27/446—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having a macromolecular matrix with other specific inorganic fillers other than those covered by A61L27/443 or A61L27/46
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/40—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
    • A61L27/44—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having a macromolecular matrix
    • A61L27/46—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having a macromolecular matrix with phosphorus-containing inorganic fillers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L27/54—Biologically active materials, e.g. therapeutic substances
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L27/58—Materials at least partially resorbable by the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P19/00—Drugs for skeletal disorders
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/28—Bones
    • A61F2002/2835—Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/3006—Properties of materials and coating materials
    • A61F2002/30062—(bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
    • A61F2002/30677—Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
    • A61L2300/20—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing organic materials
    • A61L2300/22—Lipids, fatty acids, e.g. prostaglandins, oils, fats, waxes
    • A61L2300/222—Steroids, e.g. corticosteroids
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
    • A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
    • A61L2300/43—Hormones, e.g. dexamethasone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
    • A61L2300/60—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a special physical form
    • A61L2300/62—Encapsulated active agents, e.g. emulsified droplets
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2430/00—Materials or treatment for tissue regeneration
    • A61L2430/02—Materials or treatment for tissue regeneration for reconstruction of bones; weight-bearing implants

Definitions

  • TITLE IMPLANTS INCLUDING AN OXYSTEROL AND METHODS OF USE
  • Biologies are commonly employed to promote bone growth in medical applications including fracture healing and surgical management of spinal disorders.
  • Spine fusion is often performed by orthopedic surgeons and neurosurgeons alike to address degenerative disc disease and arthritis affecting the lumbar and cervical spine, to correct deformities caused by scoliosis, and to repair instability due to spondylolisthesis. Additionally, the techniques of spinal fusion may be applied to treat arm or leg pain caused by compressed spinal nerves.
  • autogenous bone grafting commonly taken from the iliac crest of the patient, has been used to augment fusion between vertebral levels.
  • Oxysterols form a large family of oxygenated derivatives of cholesterol that are present in the circulation, and in human and animal tissues. Oxysterols have been found to be present in atherosclerotic lesions and play a role in various physiologic processes, such as cellular differentiation, inflammation, apoptosis, and steroid production. Some naturally occurring oxysterols have robust osteogenic properties and can be used to grow bone.
  • the most potent osteogenic naturally occurring oxysterol, 20(S)-hydroxycholesterol, is both osteogenic and anti- adipogenic when applied to multipotent mesenchymal cells capable of differentiating into osteoblasts and adipocytes.
  • One such oxysterol is Oxyl33 or (3S,5S,6S,8R,9S,10R, 13S, 14S.17S) 17-((S)-2- hydroxyoctan-2-yl)- 10, 13-dimethylhexadecahydro-lH-cyclopenta[a]phenanthrene-3,6-diol, which exhibits the following structures:
  • implant materials derive benefit from the presence of substantial scaffolding material such as biocompatible ceramics or other mineral scaffolds.
  • substantial scaffolding material such as biocompatible ceramics or other mineral scaffolds.
  • Such mineral materials are generally hard, and/or brittle substances.
  • the incorporation of substantial levels of mineral particles into matrix materials, particularly if the mineral particles are granules or other relatively large particles, may be difficult because the large particles of hard minerals tend to disrupt the matrix mass such that it is readily broken or eroded away, and lacks cohesiveness desired for handling prior to implant and for persistence after implant. This may present problems in achieving effective bone growth into and through the desired implant volume, due to migration or separation of the scaffolding particulates. Further, implant materials fail to provide an effective slow release of biologies for the treatment of bone defects.
  • Malleable implants implants having a high load of oxysterol, compression resistant implants, slow release implants and methods of making and using those implants are provided.
  • the implants can be formed to fit easily within a bone defect.
  • the implants have mineral particles incorporated within them and also maintain the desired combination of malleability and cohesiveness or compressive strength and cohesiveness.
  • implants which incorporate an osteogenic agent such as an oxysterol.
  • the present application is directed to an implantable osteogenic medical material comprising a malleable and cohesive implant or a compression resistant and cohesive implant that includes a combination of a biodegradable polymer, mineral particles and an active agent comprising an oxysterol.
  • the present application is directed to a malleable implant or a compression resistant and cohesive implant having adhesive properties to bind to other medical implants such as screws, rods, plates, and interbody devices comprising bone, allograft, autograft, synthetic materials and/or PEEK.
  • the malleable implant, a compression resistant and cohesive implant or a slow release implant can be a robust implant that can have a high mineral content or allograft content, still bind and be cohesive.
  • a malleable implant, a compression resistant and cohesive implant, or a slow release implant having an active agent comprising the structure:
  • the active agent is a sterol comprising Oxy 133.
  • a malleable implant configured to fit at or near a bone defect site to promote bone growth
  • the malleable implant comprising: a biodegradable polymer in an amount of about 0.1 wt % to about 20 wt % of the implant, mineral particles in an amount of about 0.1 wt % to about 95 wt % of the implant, and an active agent comprising an oxysterol, the implant configured to become moldable and shape-retaining upon being wetted with a fluid.
  • a malleable implantable matrix configured to fit at or near a bone defect site to promote bone growth, the matrix comprising: a biodegradable polymer in an amount of about 0.1 wt % to about 15 wt % of the matrix, mineral particles in an amount of about 0.1 wt % to about 95 wt % of the matrix, and an active agent comprising an oxysterol, the matrix configured to become moldable and shape-retaining upon being wetted with a fluid.
  • a method of treating a bone defect site comprising wetting an implant, the implant comprising a biodegradable polymer in an amount of about 0.1 wt % to about 20 wt % of the implant, mineral particles in an amount of about 0.1 wt % to about 95 wt % of the implant, and an active agent comprising an oxysterol, the implant configured to become moldable and shape-retaining upon being wetted with the fluid; molding the implant to a desired shape to fit into the bone defect site; and implanting the implant at the bone defect site.
  • an implant configured to fit at or near a bone defect to promote bone growth, the implant comprising: a biodegradable polymer in an amount of about 0.1 wt % to about 20 wt % of the implant and an oxysterol in an amount of about 20 wt % to about 90 wt % of the implant.
  • an implantable matrix configured to fit at or near a bone defect site to promote bone growth, the matrix comprising: a crosslinked biodegradable polymer in an amount of about 0.1 wt % to about 15 wt % of the matrix and an oxysterol in an amount of about 20 wt % to about 90 wt % of the matrix, the oxysterol having a concentration of about 100 mg/cc to about 1.0 g/cc.
  • a method for making an implant comprising adding an oxysterol in an amount of about 20 wt % to about 90 wt % based on a total weight of the implant to a biodegradable polymer, the biodegradable polymer being in an amount of about 0.1 wt % to about 20 wt % based on the total weight of the implant to form the implant.
  • a compression resistant implant configured to fit at or near a bone defect to promote bone growth
  • the compression resistant implant comprising porous ceramic particles in an amount of about 30 wt % to about 99.5 wt % based on a total weight of the implant in a biodegradable polymer in an amount of about 0.11 wt % to about 20 wt % based on the total weight of the implant, and an oxysterol disposed in or on the compression resistant implant.
  • a method of treating a bone defect comprising implanting a compression resistant implant at or near the bone defect to promote bone growth, the compression resistant implant comprising porous ceramic particles in an amount of about 30 wt % to about 99.5 wt % based on a total weight of the implant in a biodegradable polymer in an amount of about 0.1 wt % to about 20 wt % based on the total weight of the implant, and an oxysterol disposed in or on the compression resistant implant so as to treat the bone defect.
  • a method for making a compression resistant implant comprising (i) adding porous ceramic particles in an amount of about 30 wt % to about 99.5 wt % based on a total weight of the implant to a biodegradable polymer in an amount of about 0.1 wt % to about 20 wt % based on the total weight of the implant to form a mixture and adding an oxysterol to the mixture to form the compression resistant implant; (ii) adding an oxysterol to porous ceramic particles, the porous ceramic particles being in an amount of about 30 wt % to about 99.5 wt % based on a total weight of the implant to form a mixture and adding a biodegradable polymer in an amount of about 0.1 wt % to about 20 wt % based on the total weight of the implant to form the compression resistant implant; or (iii) adding an oxysterol to a biodegradable polymer, the biodegradable poly
  • the present application is directed to a slow release composition to promote bone growth, the slow release composition comprising: an oxysterol encapsulated in a biodegradable polymer to control the release of the oxysterol.
  • the oxysterol comprises (3S,5S,6S,8R,9S,10R, 13S, 14S.17S) 17-((S)-2-hydroxyoctan-2-yl)- 10, 13- dimethylhexadecahydro-lH-cyclopenta[a]phenanthrene-3,6-diol (Oxyl33), Oxyl53 or hydrates, solvates, amorphous forms, or pharmaceutically acceptable salts thereof.
  • the present application is directed to a method of making a slow release implant, the method comprising: mixing a non-aqueous solvent to form a suspension or solution of oxysterol and mixing the oxysterol suspension or solution with a biodegradable polymer to form microspheres.
  • the oxysterol comprises Oxyl33.
  • FIG. 1 illustrates powder components of a malleable implant which have been wetted by a fluid but have not yet been mixed.
  • the cohesive mass includes a biodegradable polymer such as collagen, mineral particles such as ceramic, and an active agent such as an oxysterol;
  • FIG. 2 illustrates a malleable implant after it has been wetted by a fluid.
  • the malleable implant includes a biodegradable polymer such as collagen, mineral particles such as ceramic, and an active agent such as an oxysterol.
  • the malleable implant is moldable into a shape to fit a bone defect.
  • the malleable implant is wetted with blood or bone marrow aspirate and formed into a cylindrical shape;
  • FIG. 3 illustrates a malleable implant after it has been wetted by a fluid.
  • the malleable implant includes a biodegradable polymer such as collagen, mineral particles such as ceramic, and an active agent such as an oxysterol.
  • the malleable implant is moldable into a shape to fit a bone defect.
  • the malleable implant is wetted with blood or bone marrow aspirate and formed into a spherical shape;
  • FIG. 4 illustrates a malleable implant after it has been wetted by a fluid.
  • the malleable implant includes a biodegradable polymer such as collagen, mineral particles such as ceramic, and an active agent such as an oxysterol.
  • the malleable implant is moldable into a shape to fit a bone defect. As shown in FIG. 4, the malleable implant is wetted with water or saline and formed into a cylindrical shape;
  • FIG. 5 illustrates a malleable implant after it has been wetted by a fluid.
  • the malleable implant includes a biodegradable polymer such as collagen, mineral particles such as ceramic, and an active agent such as an oxysterol.
  • the malleable implant is moldable into a shape to fit a bone defect. As shown in FIG. 5, the malleable implant is wetted with water or saline and formed into a spherical shape;
  • FIG. 6 illustrates uses of a formulation of malleable implants having 20 mg of Oxyl33 on each side of the implant, in accordance with the malleable implants described herein.
  • implantation of the implants in the posterolateral space yielded spinal fusion in a rat two-level spine model. Bone growth in rat test subjects can be seen after 4 and 8 weeks post- implantation, and fusion was confirmed by manual palpation of the spine segments at 8 weeks; and
  • FIG. 7 illustrates uses of a formulation of malleable implants having 125 mg of Oxyl33 on each side of the implant, in accordance with the malleable implants described herein.
  • implantation of the implants in the posterolateral space yielded spinal fusion in a rat two-level spine model. Bone growth in rat test subjects can be seen after 4 and 8 weeks post- implantation, and fusion was confirmed by manual palpation of the spine segments at 8 weeks.
  • an implant includes one, two, three or more implants.
  • bioactive agent as used herein is generally meant to refer to any substance that alters the physiology of a patient.
  • bioactive agent may be used interchangeably herein with the terms “therapeutic agent,” “therapeutically effective amount,” and “active pharmaceutical ingredient”, “API” or “drug”.
  • biodegradable includes compounds or components that will degrade over time by the action of enzymes, by hydrolytic action and/or by other similar mechanisms in the human body.
  • biodegradable includes that components can break down or degrade within the body to non-toxic components as cells (e.g., bone cells) infiltrate the components and allow repair of the defect.
  • biologicalerodible it is meant that the compounds or components will erode or degrade over time due, at least in part, to contact with substances found in the surrounding tissue, fluids or by cellular action.
  • bioabsorbable it is meant that the compounds or components will be broken down and absorbed within the human body, for example, by a cell or tissue.
  • Biocompatible means that the compounds or components will not cause substantial tissue irritation or necrosis at the target tissue site and/or will not be carcinogenic.
  • alkyl refers to a saturated or unsaturated, branched, straight- chain or cyclic monovalent hydrocarbon radical derived by the removal of one hydrogen atom from a single carbon atom of a parent alkane, alkene or alkyne.
  • Typical alkyl groups include, but are not limited to, methyl; ethyls such as ethanyl, ethenyl, ethynyl; propyls such as propan-l-yl, propan-2-yl, cyclopropan-l-yl, prop-l-en-l-yl, prop-l-en-2-yl, prop-2-en-l-yl, cycloprop-l-en-1- yl; cycloprop-2-en-l-yl, prop-l-yn-l-yl, prop-2-yn-l-yl, etc.; butyls such as butan-l-yl, butan-2- yl, 2-methyl-propan-l-yl, 2-methyl-propan-2-yl, cyclobutan-l-yl, but-l-en-l-yl, but-l-en-2-yl, 2- methyl-prop-l-en-yl, but-2-
  • alkenyl and/or “alkynyl” is used, as defined below.
  • the alkyl groups are (C1-C40) alkyl. In some embodiments, the alkyl groups are (C1-C6) alkyl.
  • alkanyl refers to a saturated branched, straight-chain or cyclic alkyl radical derived by the removal of one hydrogen atom from a single carbon atom of a parent alkane.
  • Typical alkanyl groups include, but are not limited to, methanyl; ethenyl; propanyls such as propan-l-yl, propan-2-yl(isopropyl), cyclopropan-l-yl, etc.; butyanyls such as butan-l-yl, butan-2-yl (sec-butyl), 2-methyl-propan-l-yl (isobutyl), 2-methyl-propan-2-yl (t-butyl), cyclobutan-l-yl, etc.; and the like.
  • the alkanyl groups are (C1-C40) alkanyl.
  • the alkanyl groups are (C1-C6) alkanyl
  • alkenyl refers to an unsaturated branched, straight-chain or cyclic alkyl radical having at least one carbon-carbon double bond derived by the removal of one hydrogen atom from a single carbon atom of a parent alkene.
  • the radical may be in either the cis or trans conformation about the double bond(s).
  • Typical alkenyl groups include, but are not limited to, ethenyl; propenyls such as prop-l-en-l-yl, prop-l-en-2-yl, prop-2-en-l-yl, prop-2-en-2-yl, cycloprop-l-en-l-yl; cycloprop-2-en-l-yl; butenyls such as but-l-en-l-yl, but-l-en-2-yl, 2- methyl-prop-l-en-l-yl, but-2-en-l-yl, but-2-en-l-yl, but-2-en-2-yl, buta-l,3-dien-l-yl, buta-1,3- dien-2-yl, cyclobut-l-en-l-yl, cyclobut-l-en-3-yl, cyclobuta-l,3-dien-l-yl, etc.; and the like.
  • alkynyl refers to an unsaturated branched, straight-chain or cyclic alkyl radical having at least one carbon-carbon triple bond derived by the removal of one hydrogen atom from a single carbon atom of a parent alkyne.
  • Typical alkynyl groups include, but are not limited to, ethynyl; propynyls such as prop-l-yn-l-yl, prop-2-yn-l-yl, etc.; butynyls such as but-l-yn-l-yl, but-3-yn-l-yl, etc.; and the like.
  • the alkynyl group is (C2- C40) alkynyl.
  • the alkynyl group is (C2-C6) alkynyl.
  • alkyldiyl refers to a saturated or unsaturated, branched, straight- chain or cyclic divalent hydrocarbon radical derived by the removal of one hydrogen atom from each of two different carbon atoms of a parent alkane, alkene or alkyne, or by the removal of two hydrogen atoms from a single carbon atom of a parent alkane, alkene or alkyne.
  • the two monovalent radical centers or each valency of the divalent radical center can form bonds with the same or different atoms.
  • Typical alkyldiyls include, but are not limited to methandiyl; ethyldiyls such as ethan-l,l-diyl, ethan-l,2-diyl, ethen-l,l-diyl, ethen-l,2-diyl; propyldiyls such as propan-
  • alkanyldiyl alkenyldiyl and/or alkynyldiyl
  • alkyldiyl group is (C1-C40) alkyldiyl. In some embodiments, the alkyldiyl group is (C1-C6) alkyldiyl.
  • saturated acyclic alkanyldiyl radicals in which the radical centers are at the terminal carbons, e.g., methandiyl (methano); ethan-l,2-diyl(ethano); propan-1,3- diyl(propano); butan-l,4-diyl(butano); and the like (also referred to as alkylenos, defined infra).
  • alkyleno refers to a straight-chain alkyldiyl radical having two terminal monovalent radical centers derived by the removal of one hydrogen atom from each of the two terminal carbon atoms of straight-chain parent alkane, alkene or alkyne.
  • Typical alkyleno groups include, but are not limited to, methano; ethylenos such as ethano, etheno, ethyno; propylenos such as propano, prop[l]eno, propa[l,2]dieno, prop[l]yno, etc.; butylenos such as butano, but[l]eno, but[2]eno, buta[l,3]dieno, but[l]yno, but[2]yno, but[l,3]diyno, etc.; and the like. Where specific levels of saturation are intended, the nomenclature alkano, alkeno and/or alkyno is used.
  • the alkyleno group is (C1-C40) alkyleno. In some embodiments, the alkyleno group is (C1-C6) alkyleno.
  • heteroalkyl refers to alkyl, alkanyl, alkenyl, alkynyl, alkyldiyl and alkyleno radicals, respectively, in which one or more of the carbon atoms are each independently replaced with the same or different heteroatomic groups.
  • aryl refers to a monovalent aromatic hydrocarbon radical derived by the removal of one hydrogen atom from a single carbon atom of a parent aromatic ring system.
  • Typical aryl groups include, but are not limited to, radicals derived from aceanthrylene, acenaphthylene, acephenanthrylene, anthracene, azulene, benzene, chrysene, coronene, fluoranthene, fluorene, hexacene, hexaphene, hexylene, as-indacene, s-indacene, indane, indene, naphthalene, octacene, octaphene, octalene, ovalene, penta-2,4-diene, pentacene, pentalene, pentaphene, perylene, phenalene, phenanthrene, pic
  • aryldiyl refers to a divalent aromatic hydrocarbon radical derived by the removal of one hydrogen atom from each of two different carbon atoms of a parent aromatic ring system or by the removal of two hydrogen atoms from a single carbon atom of a parent aromatic ring system.
  • the two monovalent radical centers or each valency of the divalent center can form bonds with the same or different atom(s).
  • Typical aryldiyl groups include, but are not limited to, divalent radicals derived from aceanthrylene, acenaphthylene, acephenanthrylene, anthracene, azulene, benzene, chrysene, coronene, fluoranthene, fluorine, hexacene, hexaphene, hexylene, as-indacene, s-indacene, indane, indene, naphthalene, octacene, octaphene, octalene, ovalene, penta-2,4-diene, pentacene, pentalene, pentaphene, perylene, phenalene, phenanthrene, picene, pleiadene, pyrene, pyranthrene, rubicene, triphenylene, trinaphthalene, and the like.
  • the aryldiyl group is (C5-C14) aryldiyl or (C5-C10) aryldiyl.
  • some preferred aryldiyl groups are divalent radicals derived from benzene and naphthalene, especially phena-l,4-diyl, naphtha-2,6-diyl and naphtha-2,7-diyl.
  • arydeno refers to a divalent bridge radical having two adjacent monovalent radical centers derived by the removal of one hydrogen atom from each of two adjacent carbon atoms of a parent aromatic ring system. Attaching an aryleno bridge radical, e.g. benzeno, to a parent aromatic ring system, e.g. benzene, results in a fused aromatic ring system, e.g. naphthalene. The bridge is assumed to have the maximum number of non-cumulative double bonds consistent with its attachment to the resultant fused ring system.
  • R 1 when taken alone is hydrogen, or when taken together with R 2 is (C5-C14) aryleno; and R 2 , when taken alone is hydrogen, or when taken together with R 1 is (C5-C14) aryleno.
  • R 1 and R 2 are each hydrogen, the resultant compound is benzene.
  • R 1 taken together with R 2 is C6 aryleno (benzeno)
  • the resultant compound is naphthalene.
  • R 1 taken together with R 2 is CIO aryleno (naphthaleno)
  • the resultant compound is anthracene or phenanthrene.
  • Typical aryleno groups include, but are not limited to, aceanthryleno, acenaphthyleno, acephenanthtyleno, anthraceno, azuleno, benzeno (benzo), chryseno, coroneno, fluorantheno, fluoreno, hexaceno, hexapheno, hexyleno, as-indaceno, s-indaceno, indeno, naphthalene (naphtho), octaceno, octapheno, octaleno, ovaleno, penta-2,4-dieno, pentaceno, pentaleno, pentapheno, peryleno, phenaleno, phenanthreno, piceno, pleiadeno, pyreno, pyranthreno, rubiceno, triphenyleno, tri
  • the involved bridging carbon atoms are denoted in brackets, e.g., [l,2]benzeno ([l,2]benzo), [l,2]naphthaleno, [2,3]naphthaleno, etc.
  • [l,2]benzeno [l,2]benzo
  • [l,2]naphthaleno [2,3]naphthaleno
  • the resultant compound is anthracene.
  • R 1 taken together with R 2 is [l,2]naphthaleno
  • the resultant compound is phenanthrene.
  • the aryleno group is (C5-C14), or (C5-C10).
  • arylaryl refers to a monovalent hydrocarbon radical derived by the removal of one hydrogen atom from a single carbon atom of a ring system in which two or more identical or non-identical parent aromatic ring systems are joined directly together by a single bond, where the number of such direct ring junctions is one less than the number of parent aromatic ring systems involved.
  • Typical arylaryl groups include, but are not limited to, biphenyl, triphenyl, phenyl-naphthyl, binaphthyl, biphenyl-naphthyl, and the like.
  • arylaryl is an arylaryl group in which each aromatic ring comprises from 5 to 14 carbons, e.g., biphenyl, triphenyl, binaphthyl, phenylnaphthyl, etc.
  • each parent aromatic ring system of an arylaryl group is independently a (C5-C14) aromatic or a (C1-C10) aromatic.
  • Some preferred are arylaryl groups in which all of the parent aromatic ring systems are identical, e.g., biphenyl, triphenyl, binaphthyl, trinaphthyl, etc.
  • biaryl refers to an arylaryl radical having two identical parent aromatic systems joined directly together by a single bond.
  • Typical biaryl groups include, but are not limited to, biphenyl, binaphthyl, bianthracyl, and the like.
  • the aromatic ring systems are (C5-C14) aromatic rings or (C5-C10) aromatic rings.
  • One preferred biaryl group is biphenyl.
  • arylalkyl refers to an acyclic alkyl radical in which one of the hydrogen atoms bonded to a carbon atom, typically a terminal or spa carbon atom, is replaced with an aryl radical.
  • Typical arylalkyl groups include, but are not limited to, benzyl, 2-phenylethan-l- yl, 2-phenylethen-l-yl, naphthylmethyl, 2-naphthylethan-l-yl, 2-naphthylethen-l-yl, naphthobenzyl, 2-naphthophenylethan-l-yl and the like.
  • arylalkyl group is (C6-C40) arylalkyl, e.g., the alkanyl, alkenyl or alkynyl moiety of the arylalkyl group is (C1-C26) and the aryl moiety is (C5-C14).
  • the arylalkyl group is (C6-C13), e.g., the alkanyl, alkenyl or alkynyl moiety of the arylalkyl group is (C1-C3) and the aryl moiety is (C5-C10).
  • heteroaryl refers to a monovalent heteroaromatic radical derived by the removal of one hydrogen atom from a single atom of a parent heteroaromatic ring system.
  • Typical heteroaryl groups include, but are not limited to, radicals derived from acridine, arsindole, carbazole, ⁇ -carboline, chromane, chromene, cinnoline, furan, imidazole, indazole, indole, indoline, indolizine, isobenzofuran, isochromene, isoindole, isoindo line, isoquinoline, isothiazole, isoxazole, naphthyridine, oxadiazole, oxazole, perimidine, phenanthridine, phenanthroline, phenazine, phthalazine, pteridine, purine, pyran, pyrazine
  • the heteroaryl group is a 5-14 membered heteroaryl, with 5-10 membered heteroaryl being particularly preferred.
  • Some preferred heteroaryl radicals are those derived from parent heteroaromatic ring systems in which any ring heteroatoms are nitrogens, such as imidazole, indole, indazole, isoindole, naphthyridine, pteridine, isoquinoline, phthalazine, purine, pyrazole, pyrazine, pyridazine, pyridine, pyrrole, quinazoline, quinoline, etc.
  • heteroaryldiyl refers to a divalent heteroaromatic radical derived by the removal of one hydrogen atom from each of two different atoms of a parent heteroaromatic ring system or by the removal of two hydrogen atoms from a single atom of a parent heteroaromatic ring system.
  • the two monovalent radical centers or each valency of the single divalent center can form bonds with the same or different atom(s).
  • Typical heteroaryldiyl groups include, but are not limited to, divalent radicals derived from acridine, arsindole, carbazole, ⁇ -carboline, chromane, chromene, cinnoline, furan, imidazole, indazole, indole, indoline, indolizine, isobenzofuran, isochromene, isoindole, isoindoline, isoquinoline, isothiazole, isoxazole, naphthyridine, oxadiazole, oxazole, perimidine, phenanthridine, phenanthroline, phenazine, phthalazine, pteridine, purine, pyran, pyrazine, pyrazole, pyridazine, pyridine, pyrimidine, pyrrole, pyrrolizine, quinazoline, quinoline, quinolizine, qui
  • the heteroaryldiyl group is 5-14 membered heteroaryldiyl or a 5-10 membered heteroaryldiyl.
  • Some preferred heteroaryldiyl groups are divalent radicals derived from parent heteroaromatic ring systems in which any ring heteroatoms are nitrogens, such as imidazole, indole, indazole, isoindole, naphthyridine, pteridine, isoquinoline, phthalazine, purine, pyrazole, pyrazine, pyridazine, pyridine, pyrrole, quinazoline, quinoline, etc.
  • heteroaryleno refers to a divalent bridge radical having two adjacent monovalent radical centers derived by the removal of one hydrogen atom from each of two adjacent atoms of a parent heteroaromatic ring system. Attaching a heteroaryleno bridge radical, e.g. pyridino, to a parent aromatic ring system, e.g. benzene, results in a fused heteroaromatic ring system, e.g., quinoline. The bridge is assumed to have the maximum number of non-cumulative double bonds consistent with its attachment to the resultant fused ring system.
  • R 1 when taken alone is hydrogen, or when taken together with R 2 is 5-14 membered heteroaryleno; and R 2 , when taken alone is hydrogen, or when taken together with R 1 is 5-14 membered heteroaryleno;
  • R 1 and R 2 are each hydrogen, the resultant compound is benzene.
  • Rl taken together with R 2 is a 6-membered heteroaryleno pyridino
  • the resultant compound is isoquinoline, quinoline or quinolizine.
  • R 1 taken together with R 2 is a 10-membered heteroaryleno (e.g., isoquinoline)
  • the resultant compound is, e.g., acridine or phenanthridine.
  • Typical heteroaryleno groups include, but are not limited to, acridino, carbazolo, ⁇ -carbolino, chromeno, cinnolino, furan, imidazolo, indazoleno, indoleno, indolizino, isobenzofurano, isochromeno, isoindoleno, isoquinolino, isothiazoleno, isoxazoleno, naphthyridino, oxadiazoleno, oxazoleno, perimidino, phenanthridino, phenanthrolino, phenazino, phthalazino, pteridino, purino, pyrano, pyrazino, pyrazoleno, pyridazino, pyridino, pyrimidino, pyrroleno, pyrrolizino, quinazolino, quinolino, quino
  • the heteroaryleno group is 5-14 membered heteroaryleno or 5-10 membered heteroaryleno.
  • Some preferred heteroaryleno radicals are those derived from parent heteroaromatic ring systems in which any ring heteroatoms are nitrogens, such as imidazolo, indolo, indazolo, isoindolo, naphthyridino, pteridino, isoquinolino, phthalazino, purino, pyrazolo, pyrazino, pyridazino, pyndmo, pyrrolo, quinazolino, quinolino, etc.
  • heteroaryl-heteroaryl refers to a monovalent heteroaromatic radical derived by the removal of one hydrogen atom from a single atom of a ring system in which two or more identical or non-identical parent heteroaromatic ring systems are joined directly together by a single bond, where the number of such direct ring junctions is one less than the number of parent heteroaromatic ring systems involved.
  • Typical heteroaryl-heteroaryl groups include, but are not limited to, bipyridyl, tripyridyl, pyridylpurinyl, bipurinyl, etc.
  • each parent heteroaromatic ring system refers to the number of atoms comprising each parent heteroaromatic ring systems.
  • 5-14 membered heteroaryl-heteroaryl is a heteroaryl-heteroaryl group in which each parent heteroaromatic ring system comprises from 5 to 14 atoms, e.g., bipyridyl, tripyridyl, etc.
  • each parent heteroaromatic ring system is independently a 5-14 membered heteroaromatic, more preferably a 5-10 membered heteroaromatic.
  • heteroaryl-heteroaryl groups in which all of the parent heteroaromatic ring systems are identical.
  • heteroaryl-heteroaryl radicals are those in which each heteroaryl group is derived from parent heteroaromatic ring systems in which any ring heteroatoms are nitrogens, such as imidazole, indole, indazole, isoindole, naphthyridine, pteridine, isoquinoline, phthalazine, purine, pyrazole, pyrazine, pyridazine, pyridine, pyrrole, quinazoline, quinoline, etc.
  • biheteroaryl refers to a heteroaryl-heteroaryl radical having two identical parent heteroaromatic ring systems joined directly together by a single bond.
  • Typical biheteroaryl groups include, but are not limited to, bipyridyl, bipurinyl, biquinolinyl, and the like.
  • the heteroaromatic ring systems are 5-14 membered heteroaromatic rings or 5-10 membered heteroaromatic rings.
  • biheteroaryl radicals are those in which the heteroaryl groups are derived from a parent heteroaromatic ring system in which any ring heteroatoms are nitrogens, such as biimidazolyl, biindolyl, biindazolyl, biisoindolyl, binaphthyridinyl, bipteridinyl, biisoquinolinyl, biphthalazinyl, bipurinyl, bipyrazolyl, bipyrazinyl, bipyridazinyl, bipyridinyl, bipyrrolyl, biquinazolinyl, biquinolinyl, etc.
  • heteroarylalkyl refers to an acyclic alkyl radical in which one of the hydrogen atoms bonded to a carbon atom, typically a terminal or sp2 carbon atom, is replaced with a heteroaryl radical. Where specific alkyl moieties are intended, the nomenclature heteroarylalkanyl, heteroarylakenyl and/or heterorylalkynyl is used.
  • the heteroarylalkyl group is a 6-20 membered heteroarylalkyl, e.g., the alkanyl, alkenyl or alkynyl moiety of the heteroarylalkyl is 1-6 membered and the heteroaryl moiety is a 5-14-membered heteroaryl.
  • the heteroarylalkyl is a 6-13 membered heteroarylalkyl, e.g., the alkanyl, alkenyl or alkynyl moiety is 1-3 membered and the heteroaryl moiety is a 5-10 membered heteroaryl.
  • substituted refers to a radical in which one or more hydrogen atoms are each independently replaced with the same or different substituent(s).
  • solvate refers to an aggregate that comprises one or more molecules of a compound of the disclosure with one or more molecules of solvent.
  • the solvent may be water, in which case the solvate may be a hydrate.
  • the solvent may be an organic solvent.
  • the compounds of the present disclosure may exist as a hydrate, including a monohydrate, dihydrate, hemihydrate, sesquihydrate, trihydrate, tetrahydrate or the like, as well as the corresponding solvated forms.
  • the compound of the disclosure may be true solvates, while in other cases, the compound of the disclosure may merely retain adventitious water or be a mixture of water plus some adventitious solvent.
  • oxysterol as used herein is meant to encompass one or more forms of oxidized cholesterol.
  • the oxysterols described herein are either independently or collectively active to bone growth in a patient, as described in WO 2013169399 Al, which is hereby incorporated by reference in its entirety.
  • the oxysterol can be in a pharmaceutically acceptable salt.
  • pharmaceutically acceptable salts include those salt-forming acids and bases that do not substantially increase the toxicity of a compound, such as, salts of alkali metals such as magnesium, potassium and ammonium, salts of mineral acids such as hydrochloride, hydriodic, hydrobromic, phosphoric, metaphosphoric, nitric and sulfuric acids, as well as salts of organic acids such as tartaric, acetic, citric, malic, benzoic, glycollic, gluconic, gulonic, succinic, arylsulfonic, e.g., p-toluenesulfonic acids, or the like.
  • Pharmaceutically acceptable salts of oxysterol include salts prepared from pharmaceutically acceptable non-toxic bases or acids including inorganic or organic bases, inorganic or organic acids and fatty acids. Salts derived from inorganic bases include aluminum, ammonium, calcium, copper, ferric, ferrous, lithium, magnesium, manganic salts, manganous, potassium, sodium, zinc, and the like.
  • Salts derived from pharmaceutically acceptable organic nontoxic bases include salts of primary, secondary, and tertiary amines, substituted amines including naturally occurring substituted amines, cyclic amines, and basic ion exchange resins, such as arginine, betaine, caffeine, choline, ⁇ , ⁇ '-dibenzylethylenediamine, diethylamine, 2- diethylaminoethanol, 2-dimethylaminoethanol, ethanolamine, ethylenediamine, N-ethyl- morpholine, N-ethylpiperidine, glucamine, glucosamine, histidine, hydrabamine, isopropylamine, lysine, methylglucamine, morpholine, piperazine, piperidine, polyamine resins, procaine, purines, theobromine, triethylamine, trimethyl amine, tripropylamine, tromethamine, and the like.
  • basic ion exchange resins
  • salts may be prepared from pharmaceutically acceptable non-toxic acids, including inorganic and organic acids.
  • acids include acetic, benzenesulfonic, benzoic, camphorsulfonic, citric, ethanesulfonic, formic, fumaric, gluconic, glutamic, hydrobromic, hydrochloric, isethionic, lactic, maleic, malic, mandelic, methanesulfonic, malonic, mucic, nitric, pamoic, pantothenic, phosphoric, propionic, succinic, sulfuric, tartaric, p- toluenesulfonic acid, trifluoroacetic acid, and the like.
  • Fatty acid salts may also be used, eg., fatty acid salts having greater than 2 carbons, greater than 8 carbons or greater than 16 carbons, such as butyric, caproic, caprylic, capric, lauric, mystiric, palmitic, stearic, arachidic or the like.
  • the oxysterol in order to reduce the solubility of the oxysterol to assist in obtaining a controlled release depot effect, is utilized as the free base or utilized in a salt which has relatively lower solubility.
  • the present application can utilize an insoluble salt such as a fatty acid salt.
  • Representative fatty acid salts include salts of oleic acid, linoleic acid, or fatty acid salts with between 8 to 20 carbons solubility, such as for example, palmeate or stearate.
  • bioactive composition or “pharmaceutical” composition as used herein may be used interchangeably. Both terms refer to compositions that can be administered to a subject. Bioactive or pharmaceutical compositions are sometimes referred to herein as “pharmaceutical compositions” or “bioactive compositions” of the current disclosure. Sometimes the phrase “administration of Oxyl33” is used herein in the context of administration of this compound to a subject (e.g., contacting the subject with the compound, injecting the compound, administering the compound in an implant, etc.). It is to be understood that the compound for such a use can generally be in the form of a pharmaceutical composition or bioactive composition comprising the oxysterol (e.g., Oxyl33).
  • oxysterol e.g., Oxyl33
  • a "therapeutically effective amount” or “effective amount” is such that when administered, the oxysterol (e.g., Oxyl33) results in alteration of the biological activity, such as, for example, enhancing bone growth, etc.
  • the dosage administered to a patient can be as single or multiple doses depending upon a variety of factors, including the drug's administered pharmacokinetic properties, the route of administration, patient conditions and characteristics (sex, age, body weight, health, size, etc.), and extent of symptoms, concurrent treatments, frequency of treatment and the effect desired.
  • the formulation is designed for immediate release.
  • the formulation is designed for sustained release.
  • the formulation comprises one or more immediate release surfaces and one or more sustained release surfaces.
  • a "depot” includes but is not limited to capsules, microspheres, microparticles, microcapsules, microfibers particles, nanospheres, nanoparticles, coating, matrices, wafers, pills, pellets, emulsions, liposomes, micelles, gels, or other pharmaceutical delivery compositions or a combination thereof.
  • Suitable materials for the depot are ideally pharmaceutically acceptable biodegradable and/or any bioabsorbable materials that are preferably FDA approved or GRAS materials. These materials can be polymeric or non-polymeric, as well as synthetic or naturally occurring, or a combination thereof.
  • the matrix can be a biodegradable depot.
  • implantable refers to a biocompatible device (e.g., implant) retaining potential for successful placement within a mammal.
  • implantable device and expressions of the like import as utilized herein refers to an object implantable through surgery, injection, or other suitable means whose primary function is achieved either through its physical presence or mechanical properties.
  • “Localized” delivery includes delivery where one or more drugs are deposited within a tissue, for example, a bone cavity, or in close proximity (within about 0.1 cm, or preferably within about 10 cm, for example) thereto.
  • the oxysterol dose delivered locally from the implant may be, for example, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95%, 99%, 99.9% or 99.999% less than the oral dosage or injectable dose.
  • mammal refers to organisms from the taxonomy class "mammalian,” including but not limited to humans, other primates such as monkeys, chimpanzees, apes, orangutans and monkeys, rats, mice, rabbits, cats, dogs, pigs, cows, horses, etc.
  • the term "particle” refers to pieces of a substance of all shapes, sizes, thickness and configuration such as fibers, threads, narrow strips, thin sheets, clips, shards, etc., that possess regular, irregular or random geometries. It should be understood that some variation in dimension will occur in the production of the particles and particles demonstrating such variability in dimensions are within the scope of the present application.
  • the mineral particles e.g., ceramic
  • the mineral particles can be from about 0.5 mm to about 1.5 mm. In some embodiments, the mineral particles can be from about 0.2 mm to about 0.5 mm.
  • the medical device comprises a matrix.
  • the "matrix" of the present application is utilized as a scaffold for bone and/or cartilage repair, regeneration, and/or augmentation.
  • the matrix provides a 3-D matrix of interconnecting pores, which acts as a scaffold for cell migration.
  • the morphology of the matrix guides cell migration and cells are able to migrate into or over the matrix, respectively. The cells then are able to proliferate and synthesize new tissue and form bone and/or cartilage.
  • the matrix is resorbable.
  • the matrix can be malleable, cohesive, flowable and/or can be shaped into any shape.
  • the term "malleable” includes that the matrix is capable of being converted from a first shape to a second shape by the application of pressure.
  • cohesive means that the putty tends to remain a singular, connected mass upon movement, including the exhibition of the ability to elongate substantially without breaking upon stretching.
  • encapsulated refers to surrounding or enclosing liquid or solid drugs within a coating (e.g., biodegradable polymer) to create small capsules, microspheres and/or microspores with useful properties. Encapsulation can also be used to enclose solids or liquids inside a micrometric wall/coating made of hard or soft soluble film, in order to reduce dosing frequency and prevent the degradation of pharmaceuticals.
  • the wall is sometimes called a shell, coating, or membrane.
  • controlled release includes where the oxysterol is released at predetermined intervals or gradually over a period of time.
  • the oxysterol can be released over 1 day to 60 days.
  • the release can be linear or non-linear and there can be burst release of the oxysterol over a period of time or if a certain condition exists, e.g., a certain pH, a certain time period, etc.
  • Prolonged release also referred to as extended release or controlled release
  • sustained release also referred to as extended release or controlled release
  • sustained release also referred to as extended release or controlled release
  • one or more therapeutic agent(s) that is introduced into the body of a human or other mammal and continuously or continually releases a stream of one or more therapeutic agents over a predetermined time period and at a therapeutic level sufficient to achieve a desired therapeutic effect throughout the predetermined time period.
  • Reference to a continuous or continual release stream is intended to encompass release that occurs as the result of biodegradation in vivo of the medical device and/or component thereof, or as the result of metabolic transformation or dissolution of the therapeutic agent(s) or conjugates of therapeutic agent(s).
  • the release need not be linear and can be pulse type dosing.
  • slow release includes where the oxysterol is introduced into a system at a reduced speed over a period of time.
  • Slow release may include an initial burst release followed by a controlled release.
  • the term "moldable” includes that the matrix can be shaped by hand or machine or injected in the target tissue site (e.g., bone defect, fracture, or void) in to a wide variety of configurations.
  • the matrix can be formed into sheets, blocks, rings, struts, plates, disks, cones, pins, screws, tubes, teeth, bones, portion of bone, wedges, cylinders, threaded cylinders, or the like, as well as more complex geometric configurations.
  • compression refers to a reduction in size or an increase in density when a force is applied to the matrix.
  • the oxysterol can be "osteogenic,” where it can enhance or accelerate the ingrowth of new bone tissue.
  • New compositions and methods are provided for implantable malleable osteogenic medical material comprising a combination of a biodegradable polymer, mineral particles and an active agent comprising an oxysterol.
  • compression resistant implants and methods of making and using those implants are provided.
  • the compression resistant implants can be formed to fit easily within a bone defect.
  • the compression resistant implants have mineral particles incorporated within them and also maintain the desired combination of compressive strength and cohesiveness.
  • compression resistant implants which incorporate an osteogenic agent, such as an oxysterol in it.
  • the malleable implant can be a robust implant that can have a high mineral content or allograft content, still bind and be cohesive.
  • there is a malleable implant configured to fit at or near a bone defect to promote bone growth the malleable implant comprising: a biodegradable polymer in an amount of about 0.1 wt % to about 20 wt % of the implant, mineral particles in an amount of about 0.1 wt % to about 95 wt % of the implant, and an oxysterol, the implant configured to become moldable upon being wetted with a fluid.
  • a compression resistant implant configured to fit at or near a bone defect to promote bone growth
  • the compression resistant implant comprising porous ceramic particles in an amount of about 30 wt % to about 99.5 wt % based on a total weight of the implant in a biodegradable polymer in an amount of about 0.1 wt % to about 20 wt % based on the total weight of the implant, and an oxysterol disposed in or on the compression resistant implant.
  • a slow release composition to promote bone growth comprising: an oxysterol encapsulated in a biodegradable polymer to control the release of the oxysterol.
  • Oxysterols are a family of molecules consisting of oxygenated derivatives of cholesterol. Oxysterols are involved in many biological processes, and have been found to possess osteogenic properties. For example, one naturally occurring oxysterol, 20(S)-hydroxycholesterol, has osteogenic and anti-adipogenic properties. Such oxysterols can be useful in healing bone fractures, long bone fusion procedures, spinal fusion procedures, interbody spinal fusion procedures, posterolateral spinal fusion procedures, cervical discectomy and fusion procedures, dental procedures, and cranial/maxillofacial procedures.
  • Oxysterols also play a role in various physiological processes, such as cellular differentiation, inflammation, apoptosis, and steroid production. Oxysterols are products of cholesterol oxidation and are formed in vivo by a variety of cell types including osteoblasts (Schroepfer. Phyiol Rev 80:361-554, 2000; Bjorkhem and Dicsfalusy. Arterioscler Thromb Vase Biol 22:734-742, 2002).
  • Certain oxysterols such as 20(S)-hydroxycholesterol, as well as 22(S)- or 22(R)-hydroxycholesterol, induce osteogenic differentiation in multipotent mesenchymal cells such as M2-10B4 (M2) marrow stromal cells and C3H10T1/2 embryonic fibroblasts (Kha et al. Bone Miner Res 19:830-840, 2004).
  • Oxysterols can induce osteogenic and inhibit adipogenic differentiation of mesenchymal stem cells through activation of the hedgehog signaling pathway, which in turn regulates the master switches that control osteogenic and adipogenic differentiation, namely Runx2 and PPARy, respectively (Richardson et al.
  • Some oxysterols also provide therapeutic uses for treatment of bone defects or disorders such as osteoporosis.
  • the implants described herein can be useful in creating new therapeutic implants and matrices that include an oxysterol for induction of local bone formation and treatment of bone defects.
  • the oxysterol is retained in the matrix and released over time, while the matrix allows influx of bone cells to grow bone and fill the defect.
  • such applications are based on the ability of these oxysterol compounds to induce the hedgehog signaling pathway.
  • the implant causes mesenchymal stem cells to show induced expression of markers of osteoblast differentiation.
  • the implants and matrices described herein can be used for a variety of therapeutic uses including but not limited to induction of local bone formation and treatment of bone defects.
  • implants containing oxysterol as described herein induce a biological response when the implant contacts a human or animal cell.
  • the cell can be a mesenchymal stem cell or a bone marrow stromal cell.
  • the biological response comprises stimulating osteoblastic differentiation, inhibiting adipocyte differentiation, or stimulating cartilage formation.
  • the implant is configured as an implant to release the oxysterol to induce a biological response at or near a surgical site or a bone defect site.
  • Oxysterols can be used to induce systemic bone formation to treat bone defects such as osteoporosis, to induce local bone formation to treat conditions such as nonunion fractures, or other bone disorders, such as jaw bone defects in dental applications/implants, and to induce spinal fusion.
  • the implant may include an oxysterol alone or in combination with one or more bone morphogenetic proteins or osteogenic agents. In some embodiments, more than one oxysterol is present in the implant.
  • the implants include Oxyl33 and/or Oxyl53.
  • the implant or matrix includes oxysterols which aid in osteogenesis.
  • the implant or matrix includes Oxy34, Oxy49, and/or Oxyl33.
  • the implant or matrix includes an oxysterol comprising the structure:
  • Rl comprises an aliphatic or cyclic substituent having at least one carbon atom.
  • R comprises an alkyl, a heteroalkyl, an alkanyl, a heteroalkanyl, an alkenyl, a heteroalkenyl, an alkynyl, a heteroalkanyl, an alkyldiyl, a heteroalkyldiyl, an alkyleno, a heteroalkyleno, an aryl, an aryldiyl, an arydeno, an arylaryl, a biaryl, an arylalkyl, a heteroaryl, a heteroaryldiyl, a heteroaryleno, a heteroaryl-heteroaryl, a biheteroaryl, a heteroarylalkyl or combinations thereof.
  • the R substituent comprises a (C1-C20) alkyl or heteroalkyl, a (C2-C20) aryl or heteroaryl, a (C6-C26) arylalkyl or heteroalkyl and a (C5-C20) arylalkyl or heteroaryl-heteroalkyl, a (C4-C10) alkyldiyl or heteroalkyldiyl, or a (C4-C10) alkyleno or heteroalkyleno.
  • the R substituent may be cyclic or acyclic, branched or unbranched, substituted or unsubstituted, aromatic, saturated or unsaturated chains, or combinations thereof.
  • the R substituent is an aliphatic group.
  • the R substituent is a cyclic group.
  • the R substituent is a hexyl group.
  • the present disclosure includes an implant or matrix including an osteogenic oxysterol (e.g., Oxyl33) and its ability to promote osteogenic differentiation in vitro.
  • Oxyl33 is a particularly effective osteogenic agent.
  • Oxyl33 is useful in treating conditions that would benefit from localized stimulation of bone formation, such as, for example, spinal fusion, fracture repair, bone regenerative/tissue applications, augmentation of bone density in the jaw for dental implants, osteoporosis or the like.
  • One particular advantage of Oxyl33 is that it provides greater ease of synthesis and improved time to fusion when compared to other osteogenic oxysterols.
  • Oxyl33 is a small molecule that can serve as an anabolic therapeutic agent for bone growth, as well as a useful agent for treatment of a variety of other conditions.
  • One aspect of the application disclosure is an implant or a matrix including Oxyl33, having the formula:
  • the Oxy 133 may be used as a bioactive or pharmaceutical composition comprising Oxy 133 or a pharmaceutically acceptable salt, solvate or hydrate thereof and a pharmaceutically acceptable carrier.
  • Oxyl33 has the IUPAC designation (3S,5S,6S,8 ?,9S,10 ?,13S,14S,17S)-17-((S)-2-hydroxyoctan-2-yl)-10,13- dimethylhexadecahydro-lH-cyclopenta[(3]phenanthrene-3,6-diol.
  • Another aspect of the disclosure is a method for inducing (stimulating, enhancing) a hedgehog (Hh) pathway mediated response, in a cell or tissue, comprising contacting the cell or tissue with a therapeutically effective amount of Oxy 133.
  • the cell or tissue can be in vitro or in a subject, such as a mammal.
  • the hedgehog (Hh) pathway mediated response involves the stimulation of osteoblastic differentiation, osteomorphogenesis, and/or osteoproliferation; the stimulation of hair growth and/or cartilage formation; the stimulation of neovasculogenesis, e.g., angiogenesis, thereby enhancing blood supply to ischemic tissues; or it is the inhibition of adipocyte differentiation, adipocyte morphogenesis, and/or adipocyte proliferation; or the stimulation of progenitor cells to undergo neurogenesis.
  • the Hh mediated response can comprise the regeneration of any of a variety of types of tissues, for use in regenerative medicine.
  • Another aspect of the disclosure is a method for treating a subject having a bone disorder, osteopenia, osteoporosis, or a bone fracture, comprising administering to the subject an effective amount of a bioactive composition or pharmaceutical composition comprising Oxyl33.
  • the subject can be administered the bioactive composition or pharmaceutical composition at a therapeutically effective dose in an effective dosage form at a selected interval to, e.g., increase bone mass, ameliorate symptoms of osteoporosis, reduce, eliminate, prevent or treat atherosclerotic lesions, or the like.
  • the subject can be administered the bioactive composition or pharmaceutical composition at a therapeutically effective dose in an effective dosage form at a selected interval to ameliorate the symptoms of osteoporosis.
  • a composition comprising Oxyl33 may include mesenchymal stem cells to induce osteoblastic differentiation of the cells at a targeted surgical area.
  • the Oxyl33 can be administered to a cell, tissue or organ by local administration.
  • the Oxyl33 can be applied locally with a cream or the like, or it can be injected or otherwise introduced directly into a cell, tissue or organ, or it can be introduced with a suitable medical device, such as an implant as discussed herein.
  • the dosage of Oxyl33 is from approximately 10 pg/day to approximately 80 g/day. In some embodiments, the dosage of Oxyl33 is from approximately 1.0 g/day, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5, 22.0, 22.5, 23.0, 23.5, 24.0, 24.5, 25.0, 25.5, 26.0, 26.5, 27.0, 27.5, 28.0, 28.5, 29.0, 29.5, 30.0, 30.5, 31.0, 31.5, 32.0, 32.5, 33.0, 33.5, 34.0, 34.5, 35.0, 35.5, 36.0, 31.5, 32.0, 3
  • Additional dosages of Oxyl33 include from approximately 2.4 ng/day to approximately 50 mg/day; approximately 50 ng/day to approximately 2.5 mg/day; approximately 250 ng/day to approximately 250 meg/day; approximately 250 ng/day to approximately 50 meg/day; approximately 250 ng/day to approximately 25 meg/day; approximately 250 ng/day to approximately 1 meg/day; approximately 300 ng/day to approximately 750 ng/day or approximately 0.50 meg/day to 500 ng/day.
  • the dose may be about 0.01 to approximately 10 meg/day or approximately 1 ng/day to about 120 meg/day.
  • the dosage of Oxyl33 is in greater amounts.
  • the dosage of Oxyl33 is from 0.01 mg/day to 5 g/day.
  • the oxysterol e.g., Oxyl33
  • the matrix can comprise the oxysterol (e.g., Oxyl33) disposed homogenously throughout it or in discrete regions or discrete layers of the matrix.
  • the oxysterol can be encapsulated in the microspheres and can comprise from about 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5, 22.0, 22.5, 23.0, 23.5, 24.0, 24.5, 25.0, 25.5, 26.0, 26.5, 27.0, 27.5, 28.0, 28.5, 29.0, 29.5, 30.0, 30.5, 31.0, 31.5, 32.0,
  • the oxysterol can be encapsulated in the microspheres and can comprise from about 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5, 22.0, 22.5, 23.0, 23.5, 24.0, 24.5, 25.0, 25.5, 26.0, 26.5, 27.0, 27.5, 28.0, 28.5, 29.0, 29.5, 30.0, 30.5, 3
  • the oxysterol can be encapsulated into the microspheres in an amount of about 400 mg/cc. In some embodiments, the oxysterol can be encapsulated into the microspheres in an amount of about 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, 400, 410, 420, 430, 440, 450, 460, 470, 480, 490, to about 500 mg/cc. In some embodiments, 400 mg/cc can be encapsulated.
  • the matrix can comprise the oxysterol (e.g., Oxyl33) disposed homogenously throughout it or in discrete regions or discrete layers of the matrix.
  • the oxysterol can be loaded in the matrix and can comprise from about 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5, 22.0, 22.5, 23.0, 23.5, 24.0, 24.5, 25.0,
  • oxysterol
  • a high concentration of the oxysterol can be loaded into the matrix and comprises from about 20 wt % to about 99 wt % of the matrix.
  • the oxysterol can be loaded into the matrix in an amount from about 20 wt % to about 90 wt %, 35 wt % to about 80 wt % or about 50 wt % to about 90 wt % of the matrix.
  • the oxysterol can be loaded into the matrix in an amount of about 20 wt % to about 30 wt %, about 30 wt % to about 40 wt %, about 40 wt % to about 50 wt %, about 50 wt % to about 60 wt %, about 60 wt % to about 70 wt %, about 70 wt % to about 80 wt %, about 80 wt % to about 90 wt %, or about 90 wt % to about 99 wt %.
  • the oxysterol can be loaded into the matrix in an amount of from about 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, to about 99 wt % of the matrix.
  • the oxysterol can be loaded in the matrix and can comprise from about 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5, 22.0, 22.5, 23.0, 23.5, 24.0, 24.5, 25.0, 25.5, 26.0, 26.5, 27.0, 27.5, 28.0, 28.5, 29.0, 29.5, 30.0, 30.5, 31.0, 31.5,
  • the oxysterol can be loaded into the matrix in an amount of about 400 mg/cc. In some embodiments, the oxysterol can be loaded into the matrix in an amount of about 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, 400, 410, 420, 430, 440, 450, 460, 470, 480, 490, to about 500 mg/cc. In some embodiments, 400 mg/cc can be loaded in the matrix.
  • the oxysterol can be loaded to the matrix in highly concentrated amounts.
  • the oxysterol is loaded into the matrix in an amount of at least 500 mg/cc.
  • the oxysterol is added to the matrix in an amount of about 1 mg/cc to about 1 g/cc, from about 100 mg/cc to about 1 g/cc, from about 500 mg/cc to about 900 mg/cc, or from about 600 mg/cc to about 800 mg/cc.
  • the oxysterol is added to the matrix in an amount of about 500 mg/cc to about 600 mg/cc, about 600 mg/cc to about 700 mg/cc, about 700 mg/cc to about 800 mg/cc, about 800 mg/cc to about 900 mg/cc, or about 900 mg/cc to about 1 g/cc.
  • Oxyl33 In addition to the compound Oxyl33, other embodiments of the disclosure encompass any and all individual stereoisomers at any of the stereocenters present in Oxyl33, including diastereomers, racemates, enantiomers, and other isomers of the compound.
  • Oxyl33 may include all polymorphs, solvates or hydrates of the compound, such as hydrates and those formed with organic solvents.
  • Suitable salts of the compound include, but are not limited to, acid addition salts, such as those made with hydrochloric, hydrobromic, hydroiodic, perchloric, sulfuric, nitric, phosphoric, acetic, propionic, glycolic, lactic, pyruvic, malonic, succinic, maleic, fumaric, malic, tartaric, citric, benzoic, carbonic cinnamic, mandelic, methanesulfonic, ethanesulfonic, hydroxyethanesulfonic, benezenesulfonic, p-toluene sulfonic, cyclohexanesulfamic, salicyclic, p-aminosalicylic, 2- phenoxybenzoic, and 2-acetoxybenzoic acid; salts made with saccharin; alkali metal salts, such as sodium and potassium salts; alkaline earth metal salts, such as calcium and magnesium salts; and salts formed with organic
  • Additional suitable salts include, but are not limited to, acetate, benzenesulfonate, benzoate, bicarbonate, bisulfate, bitartrate, borate, bromide, calcium edetate, camsylate, carbonate, chloride, clavulanate, citrate, dihydrochloride, edetate, edisylate, estolate, esylate, fumarate, gluceptate, gluconate, glutamate, glycollylarsanilate, hexylresorcinate, hydrabamine, hydrobromide, hydrochloride, hydroxynaphthoate, iodide, isothionate, lactate, lactobionate, laurate, malate, maleate, mandelate, mesylate, methylbromide, methylnitrate, methylsulfate, mucate, napsylate, nitrate, N- methylglucamine ammonium salt, ole
  • Oxyl33 includes one or more biological functions. That is, Oxyl33 can induce a biological response when contacted with a mesenchymal stem cell or a bone marrow stromal cell. For example, Oxyl33 may stimulate osteoblastic differentiation.
  • a bioactive composition including Oxyl33 may include one or more biological functions when administered to a mammalian cell, for example, a cell in vitro or a cell in a human or an animal. For example, such a bioactive composition may stimulate osteoblastic differentiation. In some embodiments, such a biological function can arise from stimulation of the hedgehog pathway.
  • the oxysterol for example Oxyl33
  • the Oxyl33 is highly purified.
  • the Oxyl33 may be crystallized or recrystallized.
  • purified Oxyl33 is formed by recrystallizing Oxyl33 in a 3: 1 mixture of acetone/water, as shown below: Scheme 1
  • the purified Oxyl33 forms a hydrate.
  • the Oxyl33 is in the anhydrous form.
  • the percent crystallinity of any of the crystalline forms of Oxyl33 described herein can vary with respect to the total amount of Oxyl33.
  • the Oxy 133 can have a percent crystallinity of a salt, hydrate, solvate or crystalline form of Oxyl33 to be at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least, 60%, at least 70%, at least 80%, at least 90%, at least 95%, or at least 99%.
  • the percent crystallinity can be substantially 100%, where substantially 100% indicates that the entire amount of Oxy 133 appears to be crystalline as best can be determined using methods known in the art.
  • therapeutically effective amounts of Oxyl33 can include amounts that vary in crystallinity. These include instances where an amount of the crystallized Oxyl33 in a solid form is subsequently dissolved, partially dissolved, or suspended or dispersed in a liquid.
  • the purified Oxyl33 is crystallized as a monohydrate.
  • the purified Oxyl33 may be crystallized in other hydrous forms, such as, for example, a dihydrate, a hemihydrate, a sesquihydrate, a trihydrate, a tetrahydrate and the like, as well as the corresponding solvated forms.
  • the Oxy 133 is crystallized in an amorphous form.
  • the purified Oxyl33 is crystallized as a co-crystal or a pharmaceutically acceptable salt.
  • the oxysterol e.g., Oxy 133
  • the oxysterol can be in amorphous form and have faster dissolution and release from the matrix. Such as, for example, a burst release from the matrix of from about 10%, 15%, 20%, 25%, 30%, 35%, 45%, to about 50% of the oxysterol over 24 or 48 hours.
  • the unpurified Oxyl33 may be solidified by mixing with heptanes. The product may be subsequently filtered and suspended in methylene chloride.
  • the unpurified Oxyl33 may be filtered from the suspension and crystallized with the use of acetone and water or other organic or inorganic solvents (e.g., diethyl ether, dichloromethane, ethyl acetate, acetone, ⁇ , ⁇ -dimethylformamide, acetonitrile, dimethyl sulfoxide, ammonia, t-butanol, n-propanol, ethanol, methanol, acetic acid or a combination thereof).
  • organic or inorganic solvents e.g., diethyl ether, dichloromethane, ethyl acetate, acetone, ⁇ , ⁇ -dimethylformamide, acetonitrile, dimethyl sulfoxide, ammonia, t-butanol, n-propanol, ethanol, methanol, acetic acid or a combination thereof.
  • the unpurified Oxyl33 may be isolated and purified by any other traditional means. That is, the unpurified Oxyl33 can be isolated and purified to the desired purity, e.g., from about 95% to about 99.9% by filtration, centrifugation, distillation to separate volatile liquids on the basis of their relative volatilities, crystallization, recrystallization, evaporation to remove volatile liquids from non- volatile solutes, solvent extraction to remove impurities, dissolving the composition in a solvent in which other components are soluble therein or other purification methods.
  • the desired purity e.g., from about 95% to about 99.9% by filtration, centrifugation, distillation to separate volatile liquids on the basis of their relative volatilities, crystallization, recrystallization, evaporation to remove volatile liquids from non- volatile solutes, solvent extraction to remove impurities, dissolving the composition in a solvent in which other components are soluble therein or other purification methods.
  • the purified Oxyl33 is formed in crystal form via crystallization, which separates the Oxy 133 from the liquid feed stream by cooling the liquid feed stream or adding precipitants which lower the solubility of byproducts and unused reactants in the reaction mixture so that the Oxyl33 forms crystals.
  • the solid crystals are then separated from the remaining liquor by filtration or centrifugation.
  • the crystals can be resolubilized in a solvent and then recrystallized and the crystals are then separated from the remaining liquor by filtration or centrifugation to obtain a highly pure sample of Oxy 133.
  • the crystals can then be granulated to the desired particle size.
  • the mineral particles e.g., ceramic
  • the mineral particles can be from about 0.5 mm to about 1.5 mm.
  • the mineral particles can be from about 0.2 mm to about 0.5 mm.
  • the unpurified Oxyl33 can be purified where the purified Oxyl33 is formed in crystalized form in a solvent and then removed from the solvent to form a high purity Oxyl33 having a purity of from about 98% to about 99.99%.
  • the Oxyl33 can be recovered via filtration or vacuum filtration before or after purification.
  • the implant comprises a matrix that provides a tissue scaffold for cells to guide the process of tissue formation in vivo in three dimensions.
  • the implant provides a porous scaffold to promote bone ingrowth. The morphology of the matrix guides cell migration and cells are able to migrate into or over the matrix. The cells then are able to proliferate and synthesize new tissue and form bone and/or cartilage.
  • one or more tissue matrices are stacked on one another.
  • compression resistant matrices are provided that improve stability and mechanical strength and resists shifting, extrusion and rotation after implantation.
  • a compression resistant implant configured to fit at or near a bone defect to promote bone growth is provided.
  • the compression resistant implant comprises porous ceramic particles in a biodegradable polymer, and an oxysterol disposed in or on the compression resistant implant.
  • the matrix of the present application can reduce or prevent compression of the implantable matrix from occurring.
  • compression of the implantable matrix causes an active agent contained within the matrix (e.g. an oxysterol) to be forced into surrounding environment, which may lead to unwanted adverse events such as local transient bone resorption. This may result in poor integration of the implant with surrounding host tissue and a failed repair.
  • an active agent contained within the matrix e.g. an oxysterol
  • unwanted leakage of the oxysterol is reduced or avoided.
  • localized release of the oxysterol may cause local irritation to the surrounding tissue.
  • the leaking of oxysterol from the implant may reduce a stable microenvironment for new bone and/or cartilage growth. It also may cause the implant to fail to retain its full efficacy over time to maximally promote bone growth at a target site.
  • the oxysterol e.g., Oxyl33
  • the oxysterol is evenly distributed throughout the interior of the matrix to facilitate uniform bone growth throughout the whole matrix.
  • the oxysterol e.g., Oxyl33
  • the matrix described herein allows the oxysterol to stay evenly distributed within the interior of the matrix and thus avoids uneven distribution of the oxysterol, for example, where a low dose of oxysterol is distributed in the upper portion of the matrix, which may promote cartilage or soft tissue formation at the target tissue site.
  • a slow release composition and/or implant to promote bone growth comprising: an oxysterol encapsulated in a biodegradable polymer to control the release of the oxysterol.
  • the biodegradable polymer is in the form of microspheres that are disposed within a biodegradable matrix.
  • the matrix provides a tissue scaffold for cells to guide the process of tissue formation in vivo in three dimensions.
  • the implant provides a porous scaffold (e.g., biodegradable matrix) to promote bone ingrowth.
  • the morphology of the matrix guides cell migration and cells are able to migrate into or over the matrix. The cells then are able to proliferate and synthesize new tissue and form bone and/or cartilage.
  • one or more tissue matrices are stacked on one another.
  • the slow release composition and/or implant comprises an oxysterol comprising (3S,5S,6S,8R,9S,10R, 13S, 14S,17S) 17-((S)-2-hydroxyoctan-2-yl)- 10, 13- dimethylhexadecahydro-lH-cyclopenta[a]phenanthrene-3,6-diol (Oxyl33), Oxyl53 or hydrates, solvates, amorphous forms, or pharmaceutically acceptable salts thereof.
  • the biodegradable polymer is in the form of microspheres.
  • the slow release composition and/or implant includes oxysterol is in an amount of about 0.1 wt % to about 50 wt % of the composition.
  • the microspheres release the oxysterol via slow release over a period of about 1 to about 30 days.
  • the microspheres are from about 1 to about 750 ⁇ in size.
  • the microspheres are porous and comprise pores having a size from about 0.01 ⁇ to about 100 ⁇ .
  • the oxysterol is administered at a dose from 1.0 g/day to about 15.0 g/day.
  • the biodegradable polymer comprises at least one poly(lactide-co-glycolide) (PLGA), polylactide (PLA), polyglycolide (PGA), D-lactide, D,L-lactide, L-lactide, D,L-lactide-co-8-caprolactone, L- lactide-co-8-caprolactone, D,L-lactide-co-glycolide-co-e-caprolactone, poly(D,L-lactide-co- caprolactone), poly(L-lactide-co-caprolactone), poly(D-lactide-co-caprolactone), poly(D-lactide-co-caprolactone), poly(D,L- lactide), poly(D-lactide), poly(L-lactide), poly(esteramide) or a combination thereof.
  • the biodegradable polymer comprises poly(lactide-co-glycolide) (PLGA).
  • the oxysterol is Oxy 133 and can be filtered by passing the Oxy 133 and a non-aqueous solvent (e.g., acetone, diethyl ether, dichloromethane, ethyl acetate, acetone, ⁇ , ⁇ -dimethylformamide, acetonitrile, dimethyl sulfoxide, ammonia, t-butanol, n- propanol, ethanol, methanol, acetic acid or a combination thereof) through a filter (e.g., 0.22 microns). This will remove bacteria and other larger-size particulates out of the composition.
  • a non-aqueous solvent e.g., acetone, diethyl ether, dichloromethane, ethyl acetate, acetone, ⁇ , ⁇ -dimethylformamide, acetonitrile, dimethyl sulfoxide, ammonia, t-butanol, n- propanol
  • the Oxy 133 used in the composition can be micronized before it is mixed with solvents and other excipients.
  • the particle size of the Oxy 133 can range from about 1 micron to 1000 microns.
  • the Oxy 133 can have a particle size of from about 5 microns to about 100 microns or from about 20 to 50 microns.
  • the Oxy 133 can be mixed with a polymer to form microspheres having an average size of from about 20 microns to about 1000 microns, or from about 100 microns to about 500 microns, or from about 200 microns to about 400 microns.
  • the microspheres are disposed within a biodegradable matrix.
  • the biodegradable matrix comprises at least one polymer comprising human- derived collagen, human collagen type I, human collagen type II, human collagen type III, human collagen type IV, human collagen type V, recombinant collagen, gelatin, or combinations thereof.
  • the biodegradable matrix further comprises mineral particles in an amount from about 0.1 wt % to about 95 wt % of the implant.
  • the implant and/or matrix is in a dry cohesive mass.
  • the implant and/or matrix comprises a cohesive mass of a biodegradable polymer, mineral particles and an oxysterol.
  • the biodegradable polymer, mineral particles and oxysterol comprise fibers, chips or particles which form a coherent mass without any additional carrier.
  • the fibers, chips or particles are processed in such a way to provide for cohesion between biodegradable polymer, mineral particles and an oxysterol without additional containment or binding agents.
  • the biodegradable polymer may be milled to create curled fibers.
  • the implant comprises fibers, chips and/or particles having a size and shape that provides for increased surface area and the ability to mechanically interlock with one another to form a coherent mass.
  • the implant is a matrix comprising a dry mass of a biodegradable polymer, mineral particles and an oxysterol. Each of the biodegradable polymer, mineral particles and an oxysterol comprises particles which are homogenously mixed with each other. As shown in FIG.
  • the powder components of matrix 10 comprise at least three components that have been wetted with a fluid.
  • matrix 10 comprises a biodegradable polymer 12, mineral particles 14 and an oxysterol 16.
  • the matrix also comprises an expandable phase, such as, for example, carboxymethylcellulose or other cellulose derivatives. As shown in FIG. 1, the matrix exists as a mixture of particles which may be mechanically bound to one another to improve holding properties.
  • the biodegradable polymer 12, mineral particles 14 and oxysterol 16 are homogenously dispersed so that once the matrix is wetted, the implant will have uniform properties throughout.
  • the oxysterol encapsulated in a biodegradable polymer has a size from about 1 to about 750 ⁇ . In some embodiments, the oxysterol encapsulated in a biodegradable polymer (e.g., microspheres) has a size from about 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 155, 160, 165, 170, 175, 180, 185, 190, 195, 200, 205, 210, 215, 220, 225, 230, 235, 240, 245, 250, 255, 260, 265, 270, 275, 280, 285, 290, 295, 300, 305, 310, 315, 320, 325, 330, 335, 340, 345
  • the microspheres are porous and comprise pores having a size of about 0.01 ⁇ to about 100 ⁇ .
  • the pores have a size of about 0.01, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95 and/or 100 ⁇ .
  • the biodegradable polymer (e.g., microspheres) comprises release layers.
  • the biodegradable polymer (e.g., microspheres) includes 1 to 10 release layers, 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 release layers.
  • the biodegradable polymer (e.g., microspheres) encapsulating the oxysterol may have a burst release surface/layer/layers that releases about 10%, 15%, 20%, 25%, 30%, 35%, 45%, to about 50% of the oxysterol over 24 or 48 hours.
  • the matrix releases the oxysterol over a period of 1-30 days, 1-90 days, 1-10 days, 1-3 days, 3-7 days, 3-12 days; 3-14 days, 7-10 days, 7-14 days, 7-21 days, 7-30 days, 7-50 days, 7-90 days, 7-140 days, 14-140 days, 3 days to 135 days, 3 days to 180 days, or 3 days to 6 months.
  • bone growth will be observed over a period of at least 14 days, for example, 14-90 days, 14-30 days, 14-60 days, 21-90 days, 21-180 days; 14-210 days, or 14 days to 6 months.
  • the dried implant material comprises a porous body that includes a particulate mineral material having an average particle diameter of about 0.4 mm to about 5.0 mm homogenously mixed with a biodegradable polymer.
  • the mineral particles have an average particle size of about 0.5 mm to about 1.5 mm. In some embodiments, the mineral particles have an average particle size of about 125 micrometers to about 750 micrometers.
  • the particulate minerals can be homogenously disposed throughout the matrix at a particle size of from about 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.30, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.40, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.5, 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59, 0.6, 0.61, 0.62, 0.63, 0.64, 0.65, 0.66, 0.67, 0.68, 0.69, 0.7, 071, 0.72, 0.73, 0.74, 0.75, 0.76, 0.77, 0.78, 0.79, 0.8,
  • the particle size distribution of the biodegradable polymer may be about 10 micrometers, 13 micrometers, 85 micrometers, 100 micrometers, 151 micrometers, 200 micrometers and all subranges therebetween. In some embodiments, at least 75% of the particles have a size from about 10 micrometers to about 200 micrometers. In some embodiments, at least 85% of the particles have a size from about 10 micrometers to about 200 micrometers. In some embodiments, at least 95% of the particles have a size from about 10 micrometers to about 200 micrometers. In some embodiments, all of the particles have a size from about 10 micrometers to about 200 micrometers.
  • At least 75% of the particles have a size from about 20 micrometers to about 180 micrometers. In some embodiments, at least 85% of the particles have a size from about 20 micrometers to about 180 micrometers. In some embodiments, at least 95% of the particles have a size from about 20 micrometers to about 180 micrometers. In some embodiments, all of the particles have a size from about 20 micrometers to about 180 micrometers.
  • the one or more oxysterols may for example have an average particle size of from about 2.2 to about 10 microns.
  • the oxysterol particles have a minimum average particle size of about 2.2 microns, or about 2.5 microns, or about 3 microns, or about 4 microns.
  • the particles also may have a maximum average particle size of about 10 microns, or about 8 microns, or about 7 microns, or about 5 microns.
  • the oxysterol has a particle size from about 5 to 30 micrometers, or about 2 microns to about 20 microns, or from 30 microns to 100 microns, however, in various embodiments, ranges from about 1 micron to 250 microns may be used. In some embodiments, the oxysterol has a particle size of about 0.1 nm to about 1 micron to provide enhanced dissolution and quicker release of from the implant.
  • the oxysterol (e.g., Oxy 133) is in nanoparticle form and from about 10.0, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, 400, 410, 420, 430, 440, 450, 460, 470, 480, 490, to about 500 nm in diameter.
  • Oxy 133 is in nanoparticle form and from about 10.0, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310, 320, 330, 340, 350,
  • the oxysterol includes a particle size of about 0.1 mm to about 5 mm to lengthen the release duration from the implant by slowing down Oxyl33 dissolution rate which might modulate bone formation.
  • the oxysterol particles may have a monophasic distribution.
  • it may be preferable to have a water-soluble oxysterol in order to produce an acute anti-inflammatory/analgesic effect that the implant is not providing.
  • the oxysterol is in the form of a solvate, hydrate or a pharmaceutically acceptable salt.
  • the oxysterol may alternatively be crystallized in an amorphous form.
  • the oxysterol is in the form of a monohydrate.
  • the oxysterol e.g., Oxy 133
  • the implant comprises Oxy 133 and a biodegradable polymer in amorphous, crystalline or semicrystalline form; where the crystalline form may include polymorphs, solvates or hydrates.
  • a matrix of the present application includes an oxysterol in an amount from about 0.1 mg/cc to about 500 mg/cc.
  • the matrix may include the oxysterol in an amount of from about 10 mg/cc, 20 mg/cc, 25 mg/cc, 30 mg/cc, 40 mg/cc, 50 mg/cc, 60 mg/cc, 70 mg/cc, 80 mg/cc, 90 mg/cc, 100 mg/cc, 110 mg/cc, 120 mg/cc, 130 mg/cc, 140 mg/cc, 150 mg/cc, 160 mg/cc, 170 mg/cc, 180 mg/cc, 190 mg/cc, 200 mg/cc, 210 mg/cc, 220 mg/cc, 230 mg/cc, 240 mg/cc, 250 mg/cc, 260 mg/cc, 270 mg/cc, 280 mg/cc, 290 mg/cc, 300 mg/cc, 310 mg
  • the oxysterol can be loaded to the matrix in highly concentrated amounts.
  • the oxysterol is loaded into the matrix in an amount of at least 500 mg/cc.
  • the oxysterol is added to the matrix in an amount of about 1 mg/cc to about 1 g/cc, from about 100 mg/cc to about 1 g/cc, from about 500 mg/cc to about 900 mg/cc, or from about 600 mg/cc to about 800 mg/cc.
  • the oxysterol is added to the matrix in an amount of about 500 mg/cc to about 600 mg/cc, about 600 mg/cc to about 700 mg/cc, about 700 mg/cc to about 800 mg/cc, about 800 mg/cc to about 900 mg/cc, or about 900 mg/cc to about 1 g/cc. In some embodiments, the oxysterol is loaded into the matrix in an amount of about 134 mg/cc.
  • the oxysterol comprises a range of about 5.0 wt % to about 50 wt % based on the total weight of the matrix or the implant prior to or after being wetted.
  • the implant comprises at least one biodegradable material in a wt% of about 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49% or 50% based on the total weight of the matrix or the implant.
  • the matrix containing the oxysterol may have a burst release surface that releases about 10%, 15%, 20%, 25%, 30%, 35%, 45%, to about 50% of the oxysterol over 24 or 48 hours.
  • a high concentration of the oxysterol can be loaded into the matrix and comprise from about 20 wt % to about 90 wt % of the matrix. In some embodiments, the oxysterol can be loaded into the matrix in an amount from about 35 wt % to about 80 wt % or about 50 wt % to about 90 wt % of the matrix.
  • the oxysterol can be loaded into the matrix in an amount of about 20 wt % to about 30 wt %, about 30 wt % to about 40 wt %, about 40 wt % to about 50 wt %, about 50 wt % to about 60 wt %, about 60 wt % to about 70 wt %, about 70 wt % to about 80 wt %, about 80 wt % to about 90 wt %, or about 90 wt % to about 99 wt %.
  • the oxysterol can be loaded into the matrix in an amount of 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, or 95 wt % of the matrix.
  • the matrix releases the oxysterol over a period of 1-90 days, 1-10 days, 1-3 days, 3-7 days, 3-12 days; 3-14 days, 7-10 days, 7-14 days, 7-21 days, 7-30 days, 7-50 days, 7-90 days, 7-140 days, 14-140 days, 3 days to 135 days, 3 days to 180 days, or 3 days to 6 months.
  • bone growth will be observed over a period of at least 14 days, for example, 14-90 days, 14-30 days, 14-60 days, 21-90 days, 21-180 days; 14-210 days, or 14 days to 6 months.
  • the one or more biodegradable polymers comprises 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5, 22.0, 22.5, 23.0, 23.5, 24.0, 24.5, 25.0, 25.5, 26.0, 26.5, 27.0, 27.5, 28.0, 28.5, 29.0, 29.5, 30.0, 30.5, 31.0, 31.5, 32.0, 32.5, 33.0, 33.5, 34.0, 34.5, 35.0, 35.5, 36.0, 36.5, 37.0, 37.5, 38.0, 38.5, 39.0, 39.5, 4
  • the biodegradable polymer is present in an amount of about 0.1 wt % to about 20 wt % of the matrix. In some embodiments, the biodegradable polymer is present in an amount between about 0.01 wt % to about 50 wt %, about 8.0 wt % to about 20 wt % or about 8.0 wt % to about 13 wt % of the matrix.
  • the biodegradable polymer is present in an amount of about 0.1 wt % to about 10 wt %, about 10 wt % to about 20 wt %, about 20 wt % to about 30 wt %, about 30 wt % to about 40 wt %, or about 40 wt % to about 50 wt %.
  • the implant is wetted to form a malleable matrix.
  • the malleable matrix is configured to be moldable to any desired shape to fit a bone defect site.
  • the malleable implant may be molded to fit into a surgical site, such as a bone defect site.
  • the shape of the matrix may be tailored to the site at which it is to be situated. For example, it may be in the shape of a morsel, a plug, a pin, a peg, a cylinder, a block, a wedge, a sheet, a strip, etc.
  • shape refers to a determined or regular form or configuration in contrast to an indeterminate or vague form or configuration (as in the case of a lump or other solid mass of no special form) and is characteristic of such materials as sheets, plates, disks, cores, tubes, wedges, cylinders, or the like. This includes forms ranging from regular, geometric shapes to irregular, angled, or non-geometric shapes, or combinations of features having any of these characteristics.
  • the implant is malleable prior to being implanted into a surgical site.
  • a medical practitioner may mold the implant to a desired shape and allow the implant to cure or dry prior to implantation.
  • the implant is malleable in vivo.
  • a medical practitioner may mold the implant directly into a bone defect site.
  • the implant is malleable and configured to be pressed into a bone defect site to fill out all crevices in a bone defect site.
  • the implant is malleable when wetted and is configured to remain malleable while in contact with a bone defect site.
  • the malleable matrix can be formed to fit into the void space of an interbody cage or around the outside of the cage in the intervertebral space.
  • the dry, coherent mass may be wetted or hydrated with a variety of fluids to form a malleable and moldable implant.
  • the matrix is wetted with sterile water, physiological saline, sodium chloride, dextrose, Lactated Ringer's solution, PBS, blood, bone marrow aspirate, bone marrow fractions or a combination thereof.
  • the amount of fluid that the matrix can be wetted with includes from about 0.25, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5, 22.0, 22.5, 23.0, 23.5, 24.0, 24.5, 25.0, 25.5, 26.0, 26.5, 27.0, 27.5, 28.0, 28.5, 29.0, 29.5, 30.0, 30.5, 31.0, 31.5, 32.0, 32.5, 33.0, 33.5, 34.0, 34.5, 35.0, 35.5, 36.0, 36.5, 37.0, 37.5, 38.0, 38.5, 39.0, 39.5, 40.0, 40.5,
  • the implant is hydrated with hyaluronic acid, cellulose ethers (such as carboxymethyl cellulose), collagen, gelatin, autoclaved bone powder, osteoconductive carriers, whole blood, blood fractions, bone marrow aspirate, concentrated bone marrow aspirate, and mixtures thereof.
  • blood fractions include serum, plasma, platelet- rich plasma, concentrated platelet-rich plasma, platelet-poor plasma, and concentrated platelet poor plasma.
  • the implant becomes a putty or a paste that can be molded into a predetermined shape or administered to a bone defect and manipulated to conform to the bone defect in such a manner that will promote healing.
  • the composition may be hydrated with about 2 ml of saline blood per 2.5g of combined DBM and periosteal powder.
  • FIG. 2 illustrates an implant 20 comprising a matrix as shown in FIG. 1 that has been wetted with a suitable fluid.
  • Implant 20 has been wetted with blood to take on a red color, and molded to the shape of a cylinder.
  • FIG. 3 shows implant 20 which has been wetted with blood and molded into a spherical shape.
  • FIG. 4 shows implant 20 which has been wetted with saline to take on a white color, and molded into a cylindrical shape.
  • FIG. 5 shows implant 20 which has been wetted with saline and molded into a spherical shape.
  • Implant 20 is wetted with a sufficient amount of blood so as to prevent Assuring of the implant when shaped by a medical practitioner.
  • Implant 20 has a biodegradable polymer, mineral particles and oxysterol which are homogenously dispersed such that the implant will have uniform properties throughout.
  • implant 20 includes regions having disproportionate amounts of one or more components.
  • implant 20 may have a region of relatively higher concentrated mineral particles to impart increased properties of compression resistance to one or more regions of implant 20.
  • the implant comprises a porous matrix configured to allow influx of at least bone and/or cartilage cells therein.
  • the matrix is also configured to release an active agent, such as an oxysterol.
  • an active agent such as an oxysterol.
  • the matrix has a plurality of pores.
  • the pores of the matrix are a size large enough to allow influx of blood, other bodily fluid, and progenitor and/or bone and/or cartilage cells into the interior to guide the process of tissue formation in vivo in three dimensions.
  • the matrix comprises a plurality of pores. In some embodiments, at least 10% of the pores are between about 50 micrometers and about 500 micrometers at their widest points.
  • At least 20% of the pores are between about 50 micrometers and about 250 micrometers at their widest points. In some embodiments, at least 30% of the pores are between about 50 micrometers and about 150 micrometers at their widest points. In some embodiments, at least 50% of the pores are between about 10 micrometers and about 500 micrometers at their widest points. In some embodiments, at least 90% of the pores are between about 50 micrometers and about 250 micrometers at their widest points. In some embodiments, at least 95% of the pores are between about 50 micrometers and about 150 micrometers at their widest points. In some embodiments, 100% of the pores are between about 10 micrometers and about 500 micrometers at their widest points.
  • the matrix has a porosity of at least about 30%, at least about 50%, at least about 60%, at least about 70%, at least about 90% or at least about 95%, or at least about 99%.
  • the pores may support ingrowth of cells, formation or remodeling of bone, cartilage and/or vascular tissue.
  • porous ceramic particles form a ceramic skeleton, the skeleton having pores in the range of 1-10 mm in diameter, and a total porosity of 50-98%.
  • the porous skeleton has pores of about 0.01 mm to about 50.0 mm in diameter.
  • the porous skeleton has pores of about 0.1 mm to about 20.0 mm in diameter.
  • an oxysterol such as Oxyl33
  • the solid or semi-solid form of the device may have a pre-dosed viscosity in the range of about 1 to about 2000 centipoise (cps), 1 to about 200 cps, or 1 to about 100 cps.
  • the semi-solid or solid implant may comprise a biodegradable polymer having a molecular weight (MW), as shown by the inherent viscosity, from about 0.10 dL/g to about 1.2 dL/g or from about 0.20 dL/g to about 0.50 dL/g.
  • MW molecular weight
  • IV ranges include but are not limited to about 0.05 to about 0.15 dL/g, about 0.10 to about 0.20 dL/g, about 0.15 to about 0.25 dL/g, about 0.20 to about 0.30 dL/g, about 0.25 to about 0.35 dL/g, about 0.30 to about 0.35 dL/g, about 0.35 to about 0.45 dL/g, about 0.40 to about 0.45 dL/g, about 0.45 to about 0.55 dL/g, about 0.50 to about 0.70 dL/g, about 0.55 to about 0.6 dL/g, about 0.60 to about 0.80 dL/g, about 0.70 to about 0.90 dL/g, about 0.80 to about 1.00 dL/g, about 0.90 to about 1.10 dL/g, about 1.0 to about 1.2 dL/g, about 1.1 to about 1.3 dL/g, about 1.2 to about 1.4 dL/g, about 1.3 to about 1.5 dL/g
  • the matrix has a modulus of elasticity in the range of about lxlO 2 to about 6xl0 5 dyn/cm 2 , or 2xl0 4 to about 5xl0 5 dyn/cm 2 , or 5xl0 4 to about 5xl0 5 dyn/cm 2 .
  • the matrix is in the form of a solid or semi-solid.
  • the matrix has a density of between about 1.6 g/cm 3 , and about 0.05 g/cm 3 . In some embodiments, the matrix has a density of between about 1.1 g/cm 3 , and about 0.07 g/cm 3 .
  • the density may be less than about 1 g/cm 3 , less than about 0.7 g/cm 3 , less than about 0.6 g/cm 3 , less than about 0.5 g/cm 3 , less than about 0.4 g/cm 3 , less than about 0.3 g/cm 3 , less than about 0.2 g/cm 3 , or less than about 0.1 g/cm 3 .
  • the diameter or diagonal of the matrix can range from 1 mm to 50 mm. In some embodiments, the diameter or diagonal of the matrix can range from 1 mm to 30 mm, or 5 mm to 10 mm which is small enough to fit through an endoscopic cannula, but large enough to minimize the number of matrices needed to fill a large the bone defect (e.g., osteochondral defect). In some embodiments, at the time of surgery, the matrix can be soaked with an oxysterol and molded by the surgeon to the desired shape to fit the tissue or bone defect.
  • the porous interior can hold the oxysterol within the matrix and because the interior is porous, the oxysterol is evenly distributed throughout the matrix when oxysterol is incorporated into the matrix, as discussed herein.
  • oxysterol will be held within the interior of the matrix and released into the environment surrounding the matrix (e.g., bone defect, osteochondral defect, etc.) as the matrix degrades over time.
  • the matrix may be seeded with harvested bone cells and/or bone tissue, such as for example, cortical bone, autogenous bone, allogenic bones and/or xenogenic bone.
  • the matrix may be seeded with harvested cartilage cells and/or cartilage tissue (e.g., autogenous, allogenic, and/or xenogenic cartilage tissue).
  • the matrix can be wetted with the graft bone tissue/cells, usually with bone tissue/cells aspirated from the patient, at a ratio of about 3: 1, 2: 1, 1: 1, 1:3 or 1:2 by volume.
  • the bone tissue/cells are permitted to soak into the matrix provided, and the matrix may be kneaded by hand or machine, thereby obtaining a pliable and cohesive consistency that may subsequently be packed into the bone defect.
  • the matrix provides a malleable, non-water soluble carrier that permits accurate placement and retention at the implantation site.
  • the harvested bone and/or cartilage cells can be mixed with the oxysterol and seeded in the interior of the matrix.
  • a method for making a slow release implant comprising: encapsulating an oxysterol by dissolving the oxysterol in dry powder form in a first solvent to form a mixture having a continuous phase, with a biodegradable polymer that degrades in water; introducing a second solvent into the mixture, wherein the second solvent is immiscible with the first solvent, introducing water into the mixture, wherein the water causes precipitation of the oxysterol to produce microspheres; and disposing the microspheres onto a biodegradable matrix, wherein the oxysterol comprises Oxyl33.
  • the solvent is an organic solvent comprising DMSO, acetic acid, acetone, DME, DMF, MTBE, acetonitrile, butanol, butanone, t-butyl alcohol, ethanol, polyethylene glycol, methanol, chlorobenzene, chloroform, toluene, propanol, pentane, heptane, ethanol, Capryol-90TM, and/or diethyl ether.
  • the Oxyl33 is crystallized as a monohydrate.
  • the oxysterol further comprises Oxyl53 or hydrates, solvates, amorphous forms, or pharmaceutically acceptable salts thereof.
  • the oxysterol is in amount of about 0.1 wt % to about 50 wt % of the implant.
  • the biodegradable polymer is poly(lactide-co-glycolide) (PLGA)
  • the microspheres further comprises a lysozyme
  • the biodegradable matrix comprises collagen
  • the implant further comprises mineral particles in an amount from about 0.1 wt % to about 95 wt % of the implant.
  • a method for making a slow release implant includes making phospholipid liposomes.
  • the method includes providing a phospholipid material, hydrophobic drug and a first fluid consisting of a supercritical, critical or near-critical fluid; and, forming a first hydrophobic drug solution of said phospholipid material, hydrophobic drug in said first fluid; providing an aqueous solution and a hydrophilic drug and forming a second hydrophilic drug solution; depressurizing said first hydrophobic drug solution in the presence of said second hydrophilic drug solution, as said first hydrophobic drug solution exits one or more orifices in the presence of said second hydrophilic drug solution, said phospholipid material, hydrophobic drug, and hydrophilic drug forming phospholipid liposomes and said first fluid removed during depressurization.
  • a method for making a slow release implant comprises adding a dispersion phase containing a high molecular compound, a drug, and a water-insoluble organic solvent to a dispersion solvent to produce an O/W (oil-in-water) type or O/O (oil-in-oil) type emulsion, or adding a W/O (water-in-oil) type emulsion, which is prepared by emulsifying an aqueous solution, in which a drug is dissolved, in a water-insoluble organic solvent, in which the high molecular compound is dissolved, to the dispersion solvent to produce a W/O/W (water- in-oil-in-water) type emulsion; and adding an ammonia solution to the emulsion produced in step a) to convert the water- insoluble organic solvent into water-soluble solvents.
  • the implant comprises a biodegradable polymer, mineral particles and an oxysterol, such as, for example, Oxyl33, to promote osteogenesis.
  • Oxyl33 provides therapeutic treatment for bone conditions.
  • the implant promotes osteogenesis.
  • Oxyl33 provides therapeutic treatment for bone conditions.
  • Oxyl33 facilitates bone formation, osteoblastic differentiation, osteomorphogenesis and/or osteoproliferation. Treatment can be administered to treat open fractures and fractures at high risk of non-union, and in subjects with spinal disorders. That is, Oxyl33 can induce spinal fusion and may help treat degenerative disc disease or arthritis affecting the lumbar or cervical vertebrae.
  • a compression resistant implant as described herein is implanted at or near the bone defect to promote bone growth, the compression resistant implant comprising porous ceramic particles in an amount of about 30 wt % to about 99.5 wt % based on a total weight of the implant in a biodegradable polymer in an amount of about 0.1 wt % to about 20 wt % based on the total weight of the implant, and an oxysterol disposed in or on the compression resistant implant so as to treat the bone defect.
  • a method for treating a bone defect site comprising: implanting an implant at the bone defect site, the implant comprising an active agent comprising an oxysterol encapsulated in microspheres in an amount of about 0.1 wt % to about 50 wt % of the implant; and a biodegradable matrix, wherein the microspheres are disposed within the biodegradable matrix and control the release of the oxysterol to treat the bone defect site, and the oxysterol comprises Oxy 133.
  • the Oxyl33 is crystallized as a monohydrate.
  • the microspheres comprise a biodegradable polymer comprising poly(lactide-co-glycolide) (PLGA), the microspheres further comprise a lysozyme, the biodegradable matrix comprises collagen, and/or the microspheres release the oxysterol via slow release over a period of about 1 to about 30 days.
  • PLGA poly(lactide-co-glycolide)
  • the implant is administered by first wetting the matrix to impart malleability and moldability properties to the implant.
  • the implant can be molded to different sizes, shapes and configurations. There are several factors that can be taken into consideration in determining the size, shape and configuration of the implant. For example, both the size and shape may allow for ease in positioning the implant at the target tissue site that is selected as the implantation. In addition, the shape and size of the system should be selected so as to minimize or prevent the implant from moving after implantation.
  • the implant can be shaped like a rod or a flat surface such as a film or sheet (e.g., ribbon-like) or the like. Flexibility may be a consideration so as to facilitate placement of the device.
  • a matrix comprising Oxy 133 may be implanted into a spinal site with mesenchymal stem cells to induce bone growth through osteoblast differentiation.
  • Periosteum tissue is one tissue type that is involved early during normal bone fracture repair process and can recruit various cell types (e.g., mesenchymal stem cells) and bone growth factors necessary for bone fracture repair.
  • periosteum tissue is utilized as a source of mesenchymal stem cells and/or growth factors in a demineralized bone composition.
  • an implant comprising Oxyl33 may be implanted or injected directly to a surgical site on a patient.
  • the implant is configured to release Oxyl33 in the form of a depot.
  • a plurality of depots e.g., pellets
  • a plurality of matrices are provided (e.g., in a kit) and administered to a surgical site and triangulate and/or surround the site needed for bone growth.
  • a plurality of matrices comprise about 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 depots.
  • a plasticizer is used to lower glass translation temperature in order to affect stability of the implant.
  • Radiographic markers can be included on the implant to permit the user to position it accurately into the target site of the patient. These radiographic markers will also permit the user to track movement and degradation of the implant at the site over time. In this embodiment, the user may accurately position the implant in the site using any of the numerous diagnostic imaging procedures. Such diagnostic imaging procedures include, for example, X-ray imaging or fluoroscopy. Examples of such radiographic markers include, but are not limited to, ceramics, barium, phosphate, bismuth, iodine, tantalum, tungsten, and/or metal beads or particles. In various embodiments, the radiographic marker could be a spherical shape or a ring around the implant. The ceramic in the composition can also be used as a radiographic marker.
  • the implant comprising the oxysterol can be administered to the target site by being shaped according to the needs of a medical procedure and passed through a "cannula" or “needle” that can be a part of a delivery device e.g., a syringe, a gun delivery device, or any medical device suitable for the delivery of the implant to a targeted organ or anatomic region.
  • a delivery device e.g., a syringe, a gun delivery device, or any medical device suitable for the delivery of the implant to a targeted organ or anatomic region.
  • the cannula or needle of the device is designed to cause minimal physical and psychological trauma to the patient.
  • the matrix and/or the microspheres comprises a biodegradable polymer, such as, for example, collagen.
  • exemplary collagens include human or non-human (bovine, ovine, piscine, and/or porcine), as well as recombinant collagen or combinations thereof.
  • suitable collagen examples include, but are not limited to, human collagen type I, human collagen type II, human collagen type III, human collagen type IV, human collagen type V, human collagen type VI, human collagen type VII, human collagen type VIII, human collagen type IX, human collagen type X, human collagen type XI, human collagen type XII, human collagen type XIII, human collagen type XIV, human collagen type XV, human collagen type XVI, human collagen type XVII, human collagen type XVIII, human collagen type XIX, human collagen type XXI, human collagen type XII, human collagen type XIII, human collagen type XXIV, human collagen type XXV, human collagen type XXVI, human collagen type XXVII, and human collagen type XXVIII, or combinations thereof.
  • Collagen further may comprise hetero- and homo- trimers of any of the above-recited collagen types.
  • the collagen comprises hetero- or homo-trimers of human collagen type I, human collagen type II, human collagen type
  • the matrix and/or the microspheres comprises collagen-containing biomaterials from the implant market which, when placed in a bone defect, provide scaffolding around which the patient's new bone and/or cartilage will grow, gradually replacing the carrier matrix as the target site heals.
  • suitable carrier matrices may include, but are not limited to, the MasterGraft® Matrix produced by Medtronic Sofamor Danek, Inc., Memphis, Tenn.; MasterGraft® Putty produced by Medtronic Sofamor Danek, Inc., Memphis, Tenn.; Absorbable Collagen Sponge (“ACS”) produced by Integra LifeSciences Corporation, Plainsboro, N.J.; bovine skin collagen fibers coated with hydroxyapatite, e.g.
  • Healos® marketed by Johnson & Johnson, USA
  • collagen sponges e.g. Hemostagene® marketed by Coletica S A, France, or e.g., Helisat® marketed by Integra Life Sciences Inc., USA
  • Collagraft® Bone Graft Matrix produced by Zimmer Holdings, Inc., Warsaw, Ind.
  • the collagen contains both soluble collagen and insoluble collagen fibers.
  • the soluble collagen and insoluble collagen fibers can first be prepared separately, and then combined. Both the soluble collagen and the insoluble collagen fibers can be derived from a variety of sources, including human, bovine, ovine, piscine, or porcine sources.
  • the matrix includes moldable compositions that include the insoluble collagen fibers at a level of 0.04 g/cc to 0.1 g/cc of the matrix, and soluble collagen at a level of 0.01 g/cc to 0.08 g/cc of the matrix.
  • such compositions include insoluble collagen fibers at a level of about 0.05 to 0.08 g/cc in the matrix, and soluble collagen at a level of about 0.02 to about 0.05 g/cc in the matrix.
  • the matrix will include insoluble collagen fibers in an amount (percent by weight) that is at least equal to or greater than the amount of soluble collagen, to contribute beneficially to the desired handling and implant properties of the matrix material.
  • the collagenous matrix will include insoluble collagen fibers and soluble collagen present in a weight ratio of 4: 1 to 1: 1, more advantageously about 75:25 to about 60:40.
  • the matrix may include the insoluble collagen fibers and soluble collagen in a weight ratio of about 75:25 to about 65:35, and in one specific embodiment about 70:30.
  • the matrix and/or the microspheres comprise biodegradable polymeric or non-polymeric material.
  • the matrix may include a biodegradable biopolymer that may provide immediate release, or sustained release of the oxysterol.
  • the biodegradable polymer comprises polyether ether ketone (PEEK).
  • the matrix may comprise one or more poly (alpha-hydroxy acids), polyglycolide (PG), polyethylene glycol (PEG) conjugates of poly (alpha-hydroxy acids), polyorthoesters (POE), polyaspirins, polyphosphagenes, collagen, hydrolyzed collagen, gelatin, hydrolyzed gelatin, fractions of hydrolyzed gelatin, elastin, starch, pre-gelatinized starch, hyaluronic acid, chitosan, alginate, albumin, fibrin, vitamin E analogs, such as alpha tocopheryl acetate, d-alpha tocopheryl succinate, D,L-lactide, or L-lactide, caprolactone, dextrans, vinylpyrrolidone, polyvinyl alcohol (PVA), PVA-g-PLGA, PEGT-PBT copolymer (polyactive), methacrylates, PEO-PPO-PAA copolymers, PLGA-PEO
  • the microspheres, matrix and/or implant may not be fully biodegradable.
  • the device may comprise polyurethane, polyurea, polyether(amide), PEBA, thermoplastic elastomeric olefin, copolyester, and styrenic thermoplastic elastomer, steel, aluminum, stainless steel, titanium, metal alloys with high non-ferrous metal content and a low relative proportion of iron, carbon device, glass device, plastics, ceramics, methacrylates, poly (N- isopropylacrylamide), PEO-PPO-PEO (pluronics) or combinations thereof.
  • these types of matrices may need to be removed after a certain amount of time.
  • the microspheres, matrix and/or implant comprises biodegradable polymers comprising wherein the at least one biodegradable polymer comprises one or more of poly(lactide-co-glycolide) (PLGA), polylactide (PLA), polyglycolide (PGA), D-lactide, D,L- lactide, L-lactide, D,L-lactide-co-8-caprolactone, L-lactide-co-8-caprolactone, D,L-lactide-co- glycolide-co-e-caprolactone, poly(D,L-lactide-co-caprolactone), poly(L-lactide-co-caprolactone), poly(D-lactide-co-caprolactone), poly(D-lactide-co-caprolactone), poly (D, L-lactide), poly(D-lactide), poly(L-lactide), poly(esteramide) or a combination thereof.
  • the oxysterol is encapsulated
  • the microspheres, matrix and/or implant comprises one or more polymers (e.g., PLA, PLGA, etc.) having a MW of from about 15,000 to about 150,000 Da or from about 25,000 to about 100,000 Da.
  • polymers e.g., PLA, PLGA, etc.
  • the microspheres, matrix and/or implant comprises at least one biodegradable material in a wt% of about 99.5%, 99%, 98%, 97%, 96%, 95%, 94%, 93%, 92%, 91%, 90%, 89%, 88%, 87%, 86%, 85%, 84%, 83%, 82%, 81%, 80%, 79%, 78%, 76%, 75%, 74%, 73%, 72%, 71%, 70%, 65%, 60%, 55%, 50%, 45%, 35%, 25%, 20%, 15%, 10%, or 5% based on the total weight of the matrix or the implant.
  • the biodegradable polymer comprises a range of about 0.1% to about 20% based on the total weight of the matrix or the implant. In some embodiments, the biodegradable polymer comprises a range of about 0.1% to about 15% based on the total weight of the matrix or the implant. In some embodiments, the biodegradable polymer comprises 14%, 13%, 12%, 11%, 9%, 8%, 7%, 6%, or 5% based on the total weight of the matrix or the implant.
  • the biodegradable polymer is present in an amount of about 0.01 wt % to about 50 wt % or about 8.0 wt % to about 50 wt % of the matrix. In some embodiments, the biodegradable polymer is present in an amount of about 0.1 wt % to about 10 wt %, about 10 wt % to about 20 wt %, about 20 wt % to about 30 wt %, about 30 wt % to about 40 wt %, or about 40 wt % to about 50 wt %.
  • Mannitol, trehalose, dextran, mPEG and/or PEG may be used as a plasticizer for the polymer.
  • the polymer and/or plasticizer may also be coated on the implant to provide the desired release profile.
  • the coating thickness may be thin, for example, from about 5, 10, 15, 20, 25, 30, 35, 40, 45 or 50 microns to thicker coatings 60, 65, 70, 75, 80, 85, 90, 95, 100 microns to delay release of the oxysterol from the implant.
  • the range of the coating on the implant ranges from about 5 microns to about 250 microns or 5 microns to about 200 microns to delay release from the implant.
  • Compression resistance is needed for many tissue engineering applications such as tibial plateau fractures, acetabular defects, long bone comminuted fractures, oral maxillofacial defects, spinal fusions, and cartilage subchondral defects. Compression resistant matrices will help facilitate adequate volumes of newly formed bone.
  • the matrix is compression resistant where the matrix resists reduction in size or an increase in density when a force is applied as compared to matrices without the elongated particles disposed in it.
  • the matrix resists compression by at 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or more in one or all directions when a force is applied to the matrix.
  • the matrix comprises mineral particles, such as, for example, ceramics.
  • the particles in the matrix comprise a resorbable ceramic, bone, synthetic degradable polymer, hyaluronic acid, chitosan or combinations thereof.
  • the particles comprise cortical, cancellous, and/or corticocancellous, allogenic, xenogenic or transgenic bone tissue.
  • the bone component can be fully mineralized or partially or fully demineralized or combinations thereof.
  • the bone component can consist of fully mineralized or partially or fully demineralized bone.
  • the matrix may comprise a resorbable ceramic (e.g., hydroxyapatite, tricalcium phosphate, bioglasses, calcium sulfate, etc.) tyrosine-derived polycarbonate poly (DTE-co-DT carbonate), in which the pendant group via the tyrosine— an amino acid— is either an ethyl ester (DTE) or free carboxylate (DT) or combinations thereof.
  • a resorbable ceramic e.g., hydroxyapatite, tricalcium phosphate, bioglasses, calcium sulfate, etc.
  • DTE-co-DT carbonate tyrosine-derived polycarbonate poly
  • the matrix may contain an inorganic material, such as an inorganic ceramic and/or bone substitute material.
  • inorganic materials or bone substitute materials include but are not limited to aragonite, dahlite, calcite, brushite, amorphous calcium carbonate, vaterite, weddellite, whewellite, struvite, urate, ferrihydrate, francolite, monohydrocalcite, magnetite, goethite, dentin, calcium carbonate, calcium sulfate, calcium phosphosilicate, sodium phosphate, calcium aluminate, calcium phosphate, hydroxyapatite, alpha- tricalcium phosphate, dicalcium phosphate, ⁇ -tricalcium phosphate, tetracalcium phosphate, amorphous calcium phosphate, octacalcium phosphate, BIOGLASSTM fluoroapatite, chlorapatite, magnesium-substituted tri
  • inorganic ceramics such as for example, calcium phosphate
  • this will act as a local source of calcium and phosphate to the cells attempting to deposit new bone.
  • the inorganic ceramic also provides compression resistance and load bearing characteristics to the matrix.
  • the mineral particles in the matrix comprise tricalcium phosphate and hydroxyapatite in a ratio of about 80:20 to about 90: 10. In some embodiments, the mineral particles in the matrix comprise tricalcium phosphate and hydroxyapatite in a ratio of about 70:30 to about 95:5. In some embodiments, the mineral particles in the matrix comprise tricalcium phosphate and hydroxyapatite in a ratio of about 85:15.
  • the implant can contain demineralized bone material disposed therein.
  • the demineralized bone material can be comprise demineralized bone, powder, chips, triangular prisms, spheres, cubes, cylinders, shards, fibers or other shapes having irregular or random geometries. These can include, for example, "substantially demineralized,” “partially demineralized,” or “fully demineralized” cortical and cancellous bone. These also include surface demineralization, where the surface of the bone construct is substantially demineralized, partially demineralized, or fully demineralized, yet the body of the bone construct is fully mineralized.
  • the covering may comprise some fully mineralized bone material.
  • the configuration of the bone material can be obtained by milling, shaving, cutting or machining whole bone as described in for example U.S. Pat. No. 5,899,939. The entire disclosure is herein incorporated by reference into the present disclosure.
  • the implant comprises elongated demineralized bone fibers having an average length to average thickness ratio or aspect ratio of the fibers from about 50: 1 to about 1000: 1.
  • the elongated demineralized bone fibers can be in the form of threads, narrow strips, or thin sheets.
  • the elongated demineralized bone fibers can be substantially linear in appearance or they can be coiled to resemble springs.
  • the elongated demineralized bone fibers are of irregular shapes including, for example, linear, serpentine or curved shapes.
  • the elongated bone fibers can be demineralized however some of the original mineral content may be retained when desirable for a particular embodiment.
  • the implant comprises elongated demineralized bone fibers and chips. In some embodiments, the implant comprises fully demineralized fibers and surface demineralized chips. In some embodiments, the ratio of fibers to chips or powders is from about 5, 10, 15, 20, 25, 30, 35, 40, or 45 fibers to about 30, 35, 40, 45, 50, 55, 60, 65, or 70 chips.
  • the biocompatible material comprises demineralized bone matrix fibers and demineralized bone matrix chips in a 30:60 ratio. In some embodiments, the biocompatible material comprises demineralized bone matrix fibers and demineralized bone matrix chips in a ratio of 25:75 to about 75:25 fibers to chips.
  • the matrix comprises mineral particles that offer compression resistance.
  • the particles comprise at least 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, or 95% by weight of the matrix.
  • the particles are predominantly any shape (e.g., round, spherical, elongated, powders, chips, fibers, cylinders, etc.).
  • the matrix comprises mineral particles in an amount of about 0.1 wt % to about 95 wt % of the matrix.
  • the matrix comprises mineral particles in an amount of about 50 wt % to about 80 wt % of the matrix.
  • the matrix comprises 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, or 79% by weight of the matrix.
  • the matrix comprises porous ceramic particles in an amount of about 30 wt % to about 99.5 wt % of the matrix.
  • the matrix comprises from about 30, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 99
  • the mineral particles are present in an amount of about 0.1 wt % to about 30 wt % of the matrix. In some embodiments, the mineral particles are present in an amount between about 0.01 wt % to about 50 wt % of the matrix. In some embodiments, the mineral particles are present in an amount between about 7.0 wt % to about 50 wt % of the matrix.
  • the mineral particles are present in an amount of about 0.1 wt % to about 10 wt %, about 10 wt % to about 20 wt %, about 20 wt % to about 30 wt %, about 30 wt % to about 40 wt %, or about 40 wt % to about 50 wt %.
  • the porosity of the particles comprises from 0 to 50%, in some embodiments, the porosity of the particles comprises 5% to 25%. In some embodiments, the particles are not entangled with each other but contact each other and portions of each particle overlap in the matrix to provide compression resistance. In some embodiments, at least 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or more of the particles overlap each other in the matrix.
  • the implant includes a high level of porosity.
  • the porosity is between about 50% and about 90%, between about 50% and about 95%, or between about 50% and about 98%.
  • the porosity of the implant is between about 60% and about 75%.
  • the implantable biocompatible porous solid matrices such as ceramics, and more specifically the matrices having interconnected pores, are advantageous in that they increase the interchange surface area with the biological medium, are bioresorbable, promote the revascularization of the tissues and have excellent osteoconductive properties.
  • growth agents may be deposited into the pores by means of precipitation.
  • the implant has compression strength of at least about 5 MPa, at least about 10 MPa, at least about 20 MPa, at least about 30 MPa, or at least about 40 MPa.
  • the implant includes a compression strength of about 1 MPa, 2 MPa, 3 MPa, 4 MPa, 5 MPa, 6 MPa, 7 MPa, 8 MPa, 9 MPa, 10 MPa, 11 MPa, 12 MPa, 13 MPa, 14 MPa, 15 MPa, 16 MPa, 17 MPa, 18 MPa, 19 MPa, 20 MPa, 21 MPa, 22 MPa, 23 MPa, 24 MPa, 25 MPa, 26 MPa, 27 MPa, 28 MPa, 29 MPa, 30 MPa, 31 MPa, 32 MPa, 33 MPa, 34 MPa, 35 MPa, 36 MPa, 37 MPa, 38 MPa, 39 MPa, 40 MPa, or any value therebetween.
  • the implant has a compression strength between about 2 MPa and about 40 MPA, between about 10 MPa and about 30 MPa, or between about 15 MPa and about 25 MPa.
  • the implant is able to resist compression in more than one dimension or direction. In some embodiments, the implant resists compression in any dimension or direction. In some embodiments, the implant is not compressed any more than about 30%in any one direction, any more than about 20% in any one direction, any more than 10% in any one direction, or any more than 5% in any one direction.
  • the aforementioned degree of compression resistance of the implant is maintained for a period of at least about 30 days, at least about 40 days, at least about 50 days, at least about 60 days, at least about 75 days, at least about 90 days, at least about 120 days, at least about 150 days or at least about 180 days in vivo.
  • the implant maintains the compression resistance for a period of about 5 days, 10 days, 15 days, 20 days, 25 days, 30 days, 35 days, 40 days, 45 days, 50 days, 55 days, 60 days, 65 days, 70 days, 75 days, 80 days, 85 days, 90 days, 95 days, 100 days, 105 days, 110 days, 115 days, 120 days, 125 days, 130 days, 135 days, 140 days, 145 days, 150 days, 155 days, 160 days, 170 days, 175 days, 180 days, or any value therebetween.
  • the particles are randomly distributed throughout the matrix. In other embodiments, the particles are uniformly or evenly distributed throughout the matrix. In some embodiments, the particles may be dispersed in the matrix using a dispersing agent. In other embodiments, the particles may be stirred in the polymer and the mechanical agitation will distribute the particles in the matrix until the desired distribution is reached (e.g., random or uniform).
  • the matrix may be seeded with harvested bone cells and/or bone tissue, such as for example, cortical bone, autogenous bone, allogenic bones and/or xenogenic bone.
  • the matrix may be seeded with harvested cartilage cells and/or cartilage tissue (e.g., autogenous, allogenic, and/or xenogenic cartilage tissue).
  • the matrix can be wetted with the graft bone tissue/cells, usually with bone tissue/cells aspirated from the patient, at a ratio of about 3: 1, 2: 1, 1: 1, 1:3 or 1 :2 by volume.
  • the bone tissue/cells are permitted to soak into the matrix provided, and the matrix may be kneaded by hand or machine, thereby obtaining a pliable and cohesive consistency that may subsequently be packed into the bone defect.
  • the matrix provides a malleable, non-water soluble carrier that permits accurate placement and retention at the implantation site.
  • the harvested bone and/or cartilage cells can be mixed with the statin and seeded in the interior of the matrix.
  • tissue will infiltrate the matrix to a degree of about at least 50 percent within about 1 month to about 6 months after implantation of the matrix. In some embodiments, about 75 percent of the matrix will be infiltrated by tissue within about 2-3 months after implantation of the matrix. In some embodiments, the matrix will be substantially, e.g., about 90 percent or more, submerged in or enveloped by tissue within about 6 months after implantation of the matrix. In some embodiments, the matrix will be completely submerged in or enveloped by tissue within about 9-12 months after implantation.
  • the matrix or components that contact the matrix e.g., plugs that are separate from the matrix on implantation
  • compression of the matrix is reduced or eliminated. If unwanted compression occurs, this causes undesirable concentrations of the oxy sterol, such as Oxy 133, to escape from the implant.
  • This high concentration of oxy sterol may lead to local transient bone resorption and excess osteoclast formation and bone breakdown. This may result in poor integration of the implant with surrounding host tissue and a failed repair.
  • unwanted leakage of the oxysterol is reduced or avoided.
  • localized release of the oxysterol may cause local irritation to the surrounding tissue.
  • the leaking of oxysterol from the implant may reduce a stable microenvironment for new bone and/or cartilage growth. It also may cause the implant to fail to retain its full efficacy over time to maximally promote bone growth at a target site.
  • the implant may comprise a material, such as, for example, an expandable phase, to facilitate swelling of the implant.
  • the expandable phase comprises polymers that swell upon taking in fluid (e.g., saline, water, bodily fluid, etc.), and thus increase the volume of the implant and which further holds the implant in position over time.
  • the expandable phase comprises a range of about 0.1% to about 20% based on the total weight of the matrix or the implant.
  • the biodegradable polymer comprises a range of about 0.1% to about 10% based on the total weight of the matrix or the implant.
  • the expandable phase comprises 0.1%, 0.25%, 0.5%, 0.75%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9% or 10% based on the total weight of the matrix or the implant.
  • the expandable phase comprises polymers, monomers, starches, gums, poly(amino acids) or a combination thereof that swell upon contact with fluid (water, saline, body fluids, etc.).
  • the amount of swelling can range from 5 to 100 percent, 5 to 40 percent, or 5 to 20 percent.
  • the time to reach maximum swelling can be varied depending on the location and desired property of the implant. In practice, the time to reach maximum swelling can occur within a period of 5 days, 3 days, 2 days or within a period of 24 hours.
  • Suitable swellable material may include, for example, hydroxypropyl cellulose, hydroxypropyl methylcellulose, hydroxyethyl methylcellulose, carboxymethylcellulose, hydroxyethylcellulose and salts thereof, Carbopol, poly(hydroxyethylmethacrylate), poly(methoxyethylmethacrylate), poly(methoxyethoxy-ethylmethacrylate), polymethylmethacrylate (PMMA), methylmethacrylate (MMA), gelatin, polyvinyl alcohols, propylene glycol, PEG 200, PEG 300, PEG 400, PEG 500, PEG 550, PEG 600, PEG 700, PEG 800, PEG 900, PEG 1000, PEG 1450, PEG 3350, PEG 4500, PEG 8000 or combinations thereof.
  • the expandable phase includes gelling polymers including but not limited to cellulosic polymers, vinyl polymers, such as polyvinylpyrrolidone; acrylic polymers and copolymers, such as acrylic acid polymer, methacrylic acid copolymers, ethyl acrylate-methyl methacrylate copolymers, or the like; or mixtures thereof.
  • gelling polymers including but not limited to cellulosic polymers, vinyl polymers, such as polyvinylpyrrolidone; acrylic polymers and copolymers, such as acrylic acid polymer, methacrylic acid copolymers, ethyl acrylate-methyl methacrylate copolymers, or the like; or mixtures thereof.
  • a non-limiting list of swellable materials which the expandable phase may comprise include polyvinyl alcohol (PVA), PVA modified with hydrophilic co-monomers, e.g., AMPS, PVA modified with fast crosslinking groups, e.g., NAAADA, PVA modified with polyvinylpyrroline (PVP), carboxymethylcellulose, polyethylene glycol (PEG), poly(vinyl ether), co-polymers of PVA and PEG, polypropylene glycol (PPG), co-polymers of PEG and PPG, copolymers of PVA or PPG, polyacrylonitrile, hydrocolloids, e.g.
  • PVA polyvinyl alcohol
  • PVA modified with hydrophilic co-monomers e.g., AMPS
  • PVA modified with fast crosslinking groups e.g., NAAADA
  • carboxymethylcellulose e.g., polyethylene glycol (P
  • the swellable material includes, for example, poly(N-isopropylacrylamide-co-acrylic acid)-poly(L-lactic acid) (NAL); poly(N-isopropyl acrylamide) (PNIPAM) grafted to other polymers such as carboxymethylcellulose (CMC) copolymers or polymers including block copolymers and end- functionalized polymers, composites or copolymers containing thermo- sensitive poly(2- ethoxyethyl vinyl ether) and/or poly(hydroxyethyl vinyl ether) and/or (EOVE200-HOVE400), whose sol-gel transition temperature is 20.5° C.
  • the swellable material in various embodiments, may be used to control release of the oxysterol into the tissue and/or the synovial space.
  • the expandable phase includes hyaluronic acid.
  • the expandable phase includes glycosaminoglycans.
  • glycosaminoglycans include chondroitin sulfate, dermatan sulfate, keratin sulfate, heparin, heparan sulfate, and hyaluronan.
  • the expandable phase includes mannitol, PEG, magnesium alginate or glycerol.
  • the polymers may be crosslinked, lightly crosslinked hydrophilic polymers. Although these polymers may be non-ionic, cationic, zwitterionic, or anionic, in various embodiments, the swellable polymers are cationic or anionic. In various embodiments, the swellable polymer may contain a multiplicity of acid functional groups, such as carboxylic acid groups, or salts thereof. Examples of such polymers suitable for use herein include those which are prepared from polymerizable, acid-containing monomers, or monomers containing functional groups which can be converted to acid groups after polymerization.
  • non-acid monomers examples include polysaccharide-based polymers such as carboxymethyl starch and cellulose, and poly(amino acid) polymers such as poly(aspartic acid).
  • Some non-acid monomers may also be included, usually in minor amounts, in preparing the absorbent polymers.
  • Such non-acid monomers include, for example, monomers containing the following types of functional groups: carboxylate or sulfonate esters, hydroxyl groups, amide groups, amino groups, nitrile groups, quaternary ammonium salt groups, and aryl groups (e.g. phenyl groups, such as those derived from styrene monomer).
  • Other potential non-acid monomers include unsaturated hydrocarbons such as ethylene, propylene, 1- butene, butadiene, or isoprene.
  • the expandable phase comprises substances which are capable of becoming freely permeable following hydration in aqueous fluids.
  • substances include polysaccharides, such as gelatin, saccharose, sorbitol, mannanes, jaluronic acid, polyaminoacids, polyalcohols, polyglycols, or the like.
  • the swellable polymer may also include additional excipients such as lubricants, flow promoting agents, plasticizers, and anti- sticking agents.
  • the expandable phase may further include polyethylene glycol, polyvinylpyrrolidone, talc, magnesium stearate, glyceryl behenate, stearic acid, or titanium dioxide.
  • the particle size distribution of the expandable phase material may be about 10 micrometers, 13 micrometers, 85 micrometers, 100 micrometers, 151 micrometers, 200 micrometers and all subranges therebetween. In some embodiments, at least 75% of the particles have a size from about 10 micrometers to about 200 micrometers. In some embodiments, at least 85% of the particles have a size from about 10 micrometers to about 200 micrometers. In some embodiments, at least 95% of the particles have a size from about 10 micrometers to about 200 micrometers. In some embodiments, all of the particles have a size from about 10 micrometers to about 200 micrometers.
  • At least 75% of the particles have a size from about 20 micrometers to about 180 micrometers. In some embodiments, at least 85% of the particles have a size from about 20 micrometers to about 180 micrometers. In some embodiments, at least 95% of the particles have a size from about 20 micrometers to about 180 micrometers. In some embodiments, all of the particles have a size from about 20 micrometers to about 180 micrometers.
  • the matrix is made by adding an oxysterol in an amount of about 20 wt % to about 90 wt % to a biodegradable polymer, the biodegradable polymer being in an amount of about 0.1 wt % to about 20 wt % based on the total weight of the implant to form a mixture.
  • the mixture forms a slurry.
  • the porous ceramic particles are added to the mixture to form the implant, the porous ceramic particles being in an amount of about 30 wt % to about 99.5 wt % based on a total weight of the implant.
  • the matrix is dried, hardened or cured to form the implant.
  • the compression resistant implant is made by adding porous ceramic particles in an amount of about 30 wt % to about 99.5 wt % based on a total weight of the implant to a biodegradable polymer in an amount of about 0.1 wt % to about 20 wt % based on the total weight of the implant to form a mixture.
  • the mixture forms a slurry.
  • the oxysterol is then added to the mixture to form the compression resistant implant.
  • the matrix is dried, hardened or cured to form the implant.
  • the compression resistant implant is made by adding an oxysterol to porous ceramic particles, the porous ceramic particles being in an amount of about 30 wt % to about 99.5 wt % based on a total weight of the implant to form a mixture.
  • the mixture forms a slurry.
  • the biodegradable polymer is then added in an amount of about 0.1 wt % to about 20 wt % based on the total weight of the implant to form the compression resistant implant.
  • the matrix is dried, hardened or cured to form the implant.
  • the compression resistant matrix is made by adding an oxysterol to a biodegradable polymer, the biodegradable polymer being in an amount of about 0.1 wt % to about 20 wt % based on the total weight of the implant to form a mixture.
  • the mixture forms a slurry.
  • the porous ceramic particles are added to the mixture to form the implant, the porous ceramic particles being in an amount of about 30 wt % to about 99.5 wt % based on a total weight of the implant.
  • the matrix is dried, hardened or cured to form the implant.
  • the porous ceramic particles form a ceramic skeleton of the implant.
  • the ceramic skeleton may contain a calcium phosphate ceramic material, such as dicalcium phosphate, tricalcium phosphate, amorphous hydroxyapatite, crystalline hydroxyapatite, coralline hydroxyapatite, hydroxyapatite e.g., ETEX CaP, silicate containing ceramics or a combination thereof.
  • the ceramic material consists of essentially or comprises fast resorbing CaP04. It may also be possible to include some polymer (e.g., natural or synthetic degradable polymer) in the ceramic slurry to give the skeleton a degree of ductility and to render it less brittle.
  • the porous ceramic can be fabricated by pouring the ceramic slurry into a porous mold made out of a material that can be dissolved away or burned out after the ceramic has set.
  • the porous skeleton can also be sintered at high temperatures, e.g., at temperatures between about 900 and about 1700 degrees C.
  • the skeleton is sintered between about 900 degrees and about 1100 degrees C. or between about 1100 and about 1300 degrees C. or between about 1300 and about 1500 degrees C. or between about 1500 degrees and about 1700 degrees C.
  • the polymer can then be poured over the porous ceramic.
  • a mixture of the matrix material e.g., collagen and oxysterol
  • a mixture of the matrix material e.g., collagen and encapsulated oxysterol in a biodegradable polymer
  • Any suitable liquid can be used including, for example, aqueous preparations such as water, saline solution (e.g.
  • the implant becomes moldable and may be shaped by a medical practitioner by hand.
  • a collagen mixture in one embodiment, can be combined with mineral particles, an oxysterol and a liquid, desirably with an aqueous preparation, to form a moldable cohesive mass.
  • Excess liquid can be removed by any suitable means, including for example by applying the cohesive mass to a liquid-permeable mold or form and draining away excess liquid.
  • the mixture of the polymer, mineral particles and/or oxysterol are molded to take the form of the implant.
  • the biodegradable polymer can be subjected to one or more additional operations such as heating, lyophilizing and/or crosslinking.
  • crosslinking can be used to improve the strength of the formed matrix.
  • the surface of the matrix can be crosslinked to reduce the size of the pores of the porous interior and thereby form the exterior of the matrix that is less permeable and/or less porous than a porous interior.
  • Crosslinking can be achieved, for example, by chemical reaction, the application of energy such as radiant energy (e.g. UV light or microwave energy), drying and/or heating and dye-mediated photo-oxidation; dehydrothermal treatment; enzymatic treatment or others.
  • a chemical crosslinking agent is used.
  • suitable cross- linking agents include those that contain bifunctional or multifunctional reactive groups, and which react with matrix.
  • Chemical crosslinking can be introduced by exposing the matrix material to a chemical crosslinking agent, either by contacting it with a solution of the chemical crosslinking agent or by exposure to the vapors of the chemical crosslinking agent. This contacting or exposure can occur before, during or after a molding operation. In any event, the resulting material can then be washed to remove substantially all remaining amounts of the chemical crosslinker if needed or desired for the performance or acceptability of the final implantable matrix.
  • Suitable chemical crosslinking agents include mono- and dialdehydes, including glutaraldehyde and formaldehyde; polyepoxy compounds such as glycerol polyglycidyl ethers, polyethylene glycol diglycidyl ethers and other polyepoxy and diepoxy glycidyl ethers; tanning agents including polyvalent metallic oxides such as titanium dioxide, chromium dioxide, aluminum dioxide, zirconium salt, as well as organic tannins and other phenolic oxides derived from plants; chemicals for esterification or carboxyl groups followed by reaction with hydrazide to form activated acyl azide functionalities in the collagen; dicyclohexyl carbodiimide and its derivatives as well as other heterobifunctional crosslinking agents; hexamethylene diisocyante; and/or sugars, including glucose, will also crosslink the matrix material.
  • polyepoxy compounds such as glycerol polyglycidyl ethers, polyethylene glycol dig
  • the matrices are formed by mixing the oxysterol with a polymer slurry such as collagen and pouring into a shaped mold.
  • the composite mixture is freeze dried and possibly chemically crosslinked and cut to the final desired shape.
  • the implant is formed by mixing the mineral particles, polymer and the oxysterol until a coherent mass is formed.
  • the mineral particles, polymer and the oxysterol are wetted and mixed in a mixing syringe or device.
  • the oxysterol is solubilized and mixed with the biodegradable polymer.
  • the oxysterol is solubilized in an organic solvent (i.e., ethanol) or optionally with a co-solvent (i.e., PEG).
  • organic solvents include tetrahydrofuran, diethyl ether, dichloromethane, ethyl acetate, acetone, n,n-dimethylformamide, acetonitrile, dimethyl sulfoxide, ammonia, t-butanol, n-propanol, ethanol, methanol, acetic acid or combinations thereof.
  • the oxysterol may be mixed in a 25:75 to a 75:25 ratio with the solvent. In some embodiments, the oxysterol is mixed in a 50:50 ratio with the solvent to form a solution or suspension of the oxysterol, which can then be added to the polymer matrix or the ceramic particles.
  • the oxy sterol is Oxy 133
  • it is typically only slightly soluble or insoluble in water.
  • the Oxyl33 can be solubilized in a non-aqueous solvent, such as for example, ethanol and mixed into a solution or suspension.
  • the Oxy 133 can be filtered by passing the Oxy 133 and solvent through a filter (e.g., 0.22 microns).
  • the Oxy 133 used in the composition can be micronized before it is mixed with solvents and other excipients.
  • the particle size of the Oxy 133 can range from about 1 micron to 250 microns.
  • the Oxy 133 can have a particle size of from about 5 microns to about 100 microns or from about 20 to 50 microns.
  • the Oxy 133 in the solution or suspension can be added to a slurry of biodegradable polymer and/or the ceramic particles, mixed and, then optionally dried.
  • the implant may be used to repair bone and/or cartilage at a target tissue site, e.g., one resulting from injury, defect brought about during the course of surgery, infection, malignancy or developmental malformation.
  • the implant can be utilized in a wide variety of orthopedic, periodontal, neurosurgical, oral and maxillofacial surgical procedures such as the repair of simple and/or compound fractures and/or non-unions; external and/or internal fixations; joint reconstructions such as arthrodesis; general arthroplasty; cup arthroplasty of the hip; femoral and humeral head replacement; femoral head surface replacement and/or total joint replacement; repairs of the vertebral column including spinal fusion and internal fixation; tumor surgery, e.g., deficit filling; discectomy; laminectomy; excision of spinal cord tumors; anterior cervical and thoracic operations; repairs of spinal injuries; scoliosis, lordosis and kyphosis treatments; intermaxillary fixation of fractures; ment
  • Specific bones which can be repaired or replaced with the implantable matrix herein include the ethmoid, frontal, nasal, occipital, parietal, temporal, mandible, maxilla, zygomatic, cervical vertebra, thoracic vertebra, lumbar vertebra, sacrum, rib, sternum, clavicle, scapula, humerus, radius, ulna, carpal bones, metacarpal bones, phalanges, ilium, ischium, pubis, femur, tibia, fibula, patella, calcaneus, tarsal and/or metatarsal bones.
  • a therapeutic agent (oxysterol, with or without one or more growth factors, etc.) may be disposed on or in the implant by hand, spraying, impregnating, injecting, brushing and/or pouring it to infuse the implant.
  • an encapsulated therapeutic agent (oxysterol, with or without one or more growth factors, etc.) may be disposed on or in the implant by hand, spraying, impregnating, injecting, brushing and/or pouring it to infuse the implant.
  • the oxysterol or the encapsulated oxysterol may be further reconstituted using a syringe and the syringe can be placed into the interior of the implant via insertion of a needle or cannula (piercing the matrix) and placing it into the interior of the implant and injecting the oxysterol so it is evenly distributed throughout the porous interior.
  • the oxysterol or the encapsulated oxysterol may be applied to the matrix prior to combining the materials and forming it into the final implant shape.
  • the oxysterol or the encapsulated oxysterol can be blended into the natural or synthetic polymer (i.e., collagen) and poured into molds of the final shape of the implant.
  • the oxysterol or the encapsulated oxysterol, such as Oxyl33 may be applied onto and/or into the porous loaded matrix after forming it into the final shape by soaking, dripping, injecting, spraying, etc.
  • the interior of the implant is loaded with oxysterol or the encapsulated oxysterol that functions as an osteoinductive factor.
  • the oxysterol or the encapsulated oxysterol can be disposed in a vial and then a surgeon can mix a fluid with the oxysterol, which can be used to load the implant with the oxysterol or the encapsulated oxysterol.
  • the amount of oxysterol or the encapsulated oxysterol may be sufficient to cause bone and/or cartilage growth.
  • the oxysterol or the encapsulated oxysterol is Oxyl33 and is contained in one or more matrices in an amount of from 1 to 2 mg per cubic centimeter of the matrix.
  • the oxysterol or the encapsulated oxysterol is supplied in a liquid carrier (e.g., an aqueous buffered solution or organic solvent).
  • Exemplary aqueous buffered solutions include, but are not limited to, TE, HEPES (2-[4-(2-hydroxyethyl)-l- piperazinyl]ethanesulfonic acid), MES (2-morpholinoethanesulfonic acid), sodium acetate buffer, sodium citrate buffer, sodium phosphate buffer, a Tris buffer (e.g., Tris-HCL), phosphate buffered saline (PBS), sodium phosphate, potassium phosphate, sodium chloride, potassium chloride, glycerol, calcium chloride or a combination thereof.
  • the buffer concentration can be from about 1 mM to 100 mM.
  • the oxysterol or the encapsulated oxysterol is provided in a vehicle (including a buffer) containing sucrose, glycine, L- glutamic acid, sodium chloride, and/or polysorbate 80.
  • vehicle including a buffer
  • exemplary organic solvents or nonaqueous solvents include DMSO, acetic acid, acetone, DME, DMF, MTBE, acetonitrile, butanol, butanone, t-butyl alcohol, ethanol, polyethylene glycol, methanol, chlorobenzene, chloroform, toluene, propanol, pentane, heptane, ethanol, diethyl ether, or the like.
  • the implant further comprises oxysterol or encapsulated oxysterol and one or more additional therapeutic agents including one or more growth factors, statins, etc.
  • Isolated osteoinductive agents that are included within a matrix are typically sterile. In a non- limiting method, sterility is readily accomplished for example by filtration through sterile filtration membranes (e.g., 0.2 micron membranes or filters).
  • the matrix includes osteoinductive agents comprising one or more members of the family of Bone Morphogenic Proteins ("BMPs"). BMPs are a class of proteins thought to have osteoinductive or growth- promoting activities on endogenous bone tissue, or function as pro-collagen precursors.
  • BMPs Bone Morphogenic Proteins
  • BMPs utilized as osteoinductive agents comprise one or more of BMP-1; BMP-2; BMP- 3; BMP-4; BMP-5; BMP-6; BMP-7; BMP-8; BMP-9; BMP-10; BMP-11; BMP-12; BMP-13; BMP-15; BMP-16; BMP-17; or BMP-18; as well as any combination of one or more of these BMPs, including full length BMPs or fragments thereof, or combinations thereof, either as polypeptides or polynucleotides encoding the polypeptide fragments of all of the recited BMPs.
  • the isolated BMP osteoinductive agents may be administered as polynucleotides, polypeptides, full length protein or combinations thereof.
  • the preferred osteoinductive factors are the recombinant human bone morphogenetic proteins (rhBMPs) because they are available in unlimited supply and do not transmit infectious diseases.
  • the bone morphogenetic protein is a rhBMP- 2, rhBMP-4, rhBMP-7, or heterodimers thereof.
  • Recombinant BMP-2 can be used at a concentration of about 0.4 mg/ml to about 10.0 mg/ml, preferably near 1.5 mg/ml.
  • any bone morphogenetic protein is contemplated including bone morphogenetic proteins designated as BMP-1 through BMP- 18.
  • BMPs are available from Wyeth, Cambridge, Mass. and the BMPs and genes encoding them may also be prepared by one skilled in the art as described in U.S. Pat. No. 5,187,076 to Wozney et al.; U.S. Pat. No. 5,366,875 to Wozney et al.; U.S. Pat. No. 4,877,864 to Wang et al.; U.S. Pat. No.
  • the matrix may include one or more members from the TGF- ⁇ superfamily.
  • the matrix may include AMH, ARTN, GDF1, GDF10, GDF11, GDF15, GDF2, GDF3, GDF3A, GDF5, GDF6, GDF7, GDF8, GDF9, GDNF, INHA, INHBA, INHBB, INHBC, INHBE, LEFTY 1, LEFTY2, MSTN, NODAL, NRTN, PSPN, TGFB 1, TGFB2, TGFB3, FGF, basic FGF, VEGF, insulin-like growth factor, EGF, PDGF, nerve growth factor or combinations thereof.
  • the growth factors and the oxysterol of the present application may be disposed on or in the matrix with other therapeutic agents.
  • the growth factor may be disposed on or in the carrier by electrospraying, ionization spraying or impregnating, vibratory dispersion (including sonication), nozzle spraying, compressed-air-assisted spraying, brushing and/or pouring.
  • Exemplary therapeutic agents include but are not limited to IL-1 inhibitors, such Kineret® (anakinra), which is a recombinant, non-glycosylated form of the human interleukin-1 receptor antagonist (IL-lRa), or AMG 108, which is a monoclonal antibody that blocks the action of IL-1.
  • Therapeutic agents also include excitatory amino acids such as glutamate and aspartate, antagonists or inhibitors of glutamate binding to NMDA receptors, AMPA receptors, and/or kainate receptors.
  • Interleukin-1 receptor antagonists thalidomide (a TNF-a release inhibitor), thalidomide analogues (which reduce TNF-a production by macrophages), quinapril (an inhibitor of angiotensin II, which upregulates TNF-a), interferons such as IL-11 (which modulate TNF-a receptor expression), and aurin-tricarboxylic acid (which inhibits TNF-a), may also be useful as therapeutic agents for reducing inflammation. It is further contemplated that where desirable a pegylated form of the above may be used.
  • therapeutic agents include NF kappa B inhibitors such as antioxidants, such as dithiocarbamate, and other compounds, such as, for example, sulfasalazine, statins or the like.
  • therapeutic agents suitable for use also include, but are not limited to, an anti-inflammatory agent, analgesic agent, or osteoinductive growth factor or a combination thereof.
  • the biodegradable polymer, mineral particles, oxysterol or encapsulated oxysterol and devices to administer the implant may be sterilizable.
  • one or more components of the matrix, and/or medical device to administer it may be sterilizable by radiation in a terminal sterilization step in the final packaging. Terminal sterilization of a product provides greater assurance of sterility than from processes such as an aseptic process, which require individual product components to be sterilized separately and the final package assembled in a sterile environment.
  • gamma radiation is used in the terminal sterilization step, which involves utilizing ionizing energy from gamma rays that penetrates deeply in the device.
  • Gamma rays are highly effective in killing microorganisms, they leave no residues nor have sufficient energy to impart radioactivity to the device.
  • Gamma rays can be employed when the device is in the package and gamma sterilization does not require high pressures or vacuum conditions, thus, package seals and other components are not stressed.
  • gamma radiation eliminates the need for permeable packaging materials.
  • the implantable matrix may be packaged in a moisture resistant package and then terminally sterilized by gamma irradiation. In use the surgeon removes the one or all components from the sterile package for use.
  • electron beam (e-beam) radiation may be used to sterilize one or more components of the matrix.
  • E-beam radiation comprises a form of ionizing energy, which is generally characterized by low penetration and high-dose rates.
  • E-beam irradiation is similar to gamma processing in that it alters various chemical and molecular bonds on contact, including the reproductive cells of microorganisms. Beams produced for e-beam sterilization are concentrated, highly-charged streams of electrons generated by the acceleration and conversion of electricity.
  • Other methods may also be used to sterilize the implantable matrix and/or one or more components of the matrix, including, but not limited to, gas sterilization, such as, for example, with ethylene oxide or steam sterilization.
  • a kit comprising the oxysterol or the encapsulated oxysterol, matrix, mineral particles, and/or diluents.
  • the kit may include additional parts along with the implantable matrix combined together to be used to implant the matrix (e.g., wipes, needles, syringes, mixing syringe or other mixing device, etc.).
  • the kit may include the matrix in a first compartment.
  • the second compartment may include a vial holding the oxysterol, diluent and any other instruments needed for the localized delivery.
  • a third compartment may include gloves, drapes, wound dressings and other procedural supplies for maintaining sterility of the implanting process, as well as an instruction booklet, which may include a chart that shows how to implant the matrix after reconstituting it.
  • a fourth compartment may include additional needles and/or sutures. Each tool may be separately packaged in a plastic pouch that is radiation sterilized.
  • a fifth compartment may include an agent for radiographic imaging.
  • a cover of the kit may include illustrations of the implanting procedure and a clear plastic cover may be placed over the compartments to maintain sterility.
  • a first formulation of the moldable implant was prepared having a composition as shown in Table 1.
  • the values listed in Table 2 refer to the composition of the dry powder components of the matrix prior to being wetted with physiologically acceptable saline.
  • the carboxymethylcellulose was added to impart the implant with adhesive properties. It was found that the carboxymethylcellulose also caused the implant to significantly expand upon wetting. In some cases, the carboxymethylcellulose expanded the implant to twice the size of the dry compound in some dimensions.
  • the collagen added to the composition was porcine fibrillar Type I collagen.
  • the ceramic comprised beta tri-calcium phosphate and hydroxyapatite in a ratio of 85: 15. The ceramic particles had a particle size of about 125 ⁇ to about 750 ⁇ .
  • Oxy 133 was added to the composition at an amount of about 400 mg/cc. The Oxy 133 added was in the crystalline form of a monohydrate.
  • Example 2 A formulation of the moldable implant was prepared having a composition as shown in Table 2.
  • the values listed in Table 2 refer to the composition of the powder components of the matrix prior to being wetted with physiologically acceptable saline. Upon being wetted, it was found that the collagen held the implant together with little to no crosslinking.
  • the collagen added to the composition was porcine fibrillar Type I collagen.
  • the ceramic comprised beta tri-calcium phosphate and hydroxyapatite in a ratio of 85: 15.
  • the ceramic particles had a particle size of about 125 ⁇ to about 750 ⁇ . Small particles were preferred to create a larger surface area to volume ratio to provide faster resorption after implantation in a bony defect.
  • a relatively high amount of ceramic was provided to the composition to impart properties of compression resistance.
  • Oxyl33 was added to the composition at a level of about 400 mg/cc. The Oxyl33 added was in the crystalline form of a monohydrate.
  • compositions were prepared according to the specifications of Examples 1 or 2 above. The compositions were wetted with sterilized water.
  • compositions were prepared according to the specifications of Examples 1 or 2 above. The compositions were wetted with blood.
  • compositions were prepared according to the specifications of Examples 1 or 2 above. The compositions were wetted with bone marrow aspirate.
  • Example 6 A dry composition of a matrix containing Oxyl33, collagen, and ceramic particles as described herein was prepared and wetted with 1.4 cc of heparinized rabbit blood. The matrix was rolled into a ball and a cylinder. It was observed that the shaped matrix showed slight fissuring, and an additional 0.3 cc of heparinized rabbit blood was added to the matrix. The added wetting fluid allowed the matrix to be shaped with no fissuring.
  • a dry composition of a matrix containing Oxyl33, collagen, ceramic particles, and carboxymethylcellulose as described herein was prepared.
  • the dry matrix was incrementally wetted with heparinized rabbit blood. It was found that volumes below about 1.3 cc of blood were ineffective in adequately wetting the matrix. After 1.43 cc of blood had been added, the matrix was rolled into a cohesive ball and cylinder shapes with no fissuring. Carboxymethylcellulose was found to provide cohesiveness and adhesiveness to the matrix.
  • a dry composition of a matrix containing Oxyl33, collagen, and ceramic particles as described herein was prepared and wetted with 1.46 cc of physiologically acceptable saline.
  • Fresh bone graft was obtained from the iliac crest of rabbits. The bone chips were progressively added to the matrix. The matrix cohesively rolled into a ball and cylinder shapes with no fissuring when up to an amount of 2.0 cc of bone graft was added.
  • a dry composition of a matrix containing Oxyl33, collagen and ceramic as described herein was prepared and wetted with sterile water to be implanted in rat spines as shown in FIG. 6.
  • the wetted matrix was cut in half with a razor blade to yield two halves.
  • the two implants were molded into cylindrical shapes prior to insertion and were positioned bilaterally in the posterolateral space of each test subject.
  • Each implant contained 20 mg Oxyl33.
  • Radiographs were taken roughly 10 minutes after the procedure, 4 weeks after the procedure, and 8 weeks after the procedure.
  • the implants promoted bridging bone across the transverse processes of L3-L5 at the 4-week and 8-week timepoints. Fusion was tested at 8-week sacrifice by manual palpation.
  • the section of the spine where the implants were located showed limited flexibility in the manual palpation evaluation, indicating that fusion had occurred. In this study, fusion was observed in 5/5 (100%) of the rat spines receiving the described formulation.
  • a dry composition of a matrix containing Oxyl33, collagen and ceramic as described herein was prepared and wetted with sterile water to be implanted in rat spines as shown in FIG. 6.
  • the wetted matrix was cut in half with a razor blade to yield two halves.
  • the two implants were molded into cylindrical shapes prior to insertion and were positioned bilaterally in the posterolateral space of each test subject.
  • Each implant contained 125 mg Oxyl33.
  • Radiographs were taken roughly 10 minutes after the procedure, 4 weeks after the procedure, and 8 weeks after the procedure.
  • the implants promoted bridging bone across the transverse processes of L3-L5 at the 4-week and 8-week timepoints. Fusion was tested at 8-week sacrifice by manual palpation.
  • the section of the spine where the implants were located showed limited flexibility in the manual palpation evaluation, indicating that fusion had occurred. In this study, fusion was observed in 5/5 (100%) of the rat spines receiving the described formulation.

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Abstract

L'invention concerne un implant malléable configuré pour s'adapter au niveau ou à proximité d'un site de défaut osseux afin de favoriser la croissance osseuse, l'implant malléable comprenant: un polymère biodégradable, des particules minérales, et un oxystérol, l'implant étant configuré pour devenir moulable lorsqu'il est mouillé avec un fluide. L'invention concerne également des procédés de préparation et d'utilisation.
EP16812443.6A 2015-06-17 2016-06-16 Implants comprenant un oxystérol et procédés d'utilisation Active EP3310337B1 (fr)

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US14/741,673 US9878070B2 (en) 2015-06-17 2015-06-17 Malleable implants including an oxysterol and methods of use
US14/796,601 US10632230B2 (en) 2015-07-10 2015-07-10 Implants having a high drug load of an oxysterol and methods of use
US14/796,625 US9987289B2 (en) 2015-07-10 2015-07-10 Slow release oxysterols and methods of use
US14/796,564 US9877836B2 (en) 2015-07-10 2015-07-10 Compression resistant implants including an oxysterol and methods of use
PCT/US2016/037884 WO2016205525A1 (fr) 2015-06-17 2016-06-16 Implants comprenant un oxystérol et procédés d'utilisation

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US10632230B2 (en) * 2015-07-10 2020-04-28 Warsaw Orthopedic, Inc. Implants having a high drug load of an oxysterol and methods of use
AU2016347052B2 (en) * 2015-10-27 2021-03-25 Warsaw Orthopedic, Inc. Implants having a drug load of an oxysterol and methods of use
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CN107683130A (zh) 2018-02-09
AU2021204017A1 (en) 2021-07-08
CN107683130B (zh) 2022-03-04
AU2016280107A1 (en) 2017-12-07
EP3310337B1 (fr) 2021-03-03
CA2986753A1 (fr) 2016-12-22
AU2016280107B2 (en) 2021-04-01
JP2018517527A (ja) 2018-07-05
EP3834816A1 (fr) 2021-06-16

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